Dude, I'm 4 years late but you're an absolute legend for explaining these topics in such an easy-to-understand way, so I thank you for helping with my revision before mocks.
Good Video, thanks! To improve: Skeletal formula Didn't mention alphabetical priority Didn't mention priority within groups: carboxylic acid has higher priority than alcohols so it takes suffix and alchohol becomes prefix. Didn't mention some of the suffixes like hydroxy for alchohol.
I got a U is AS chem (as did like 90% of my year), so I'm resitting it this year while doing A2 chem, and I can honestly say if I pass AS and A2 chem this year and subsequently get into my chosen uni I'll have you to thank! Your videos are genuinely amazing! Thank you so much for putting your time and effort into them, I owe you one :-)
29:13, 2,2,2-trichlorobutane does not exist. The 2nd carbon in the chain can only make 4 bonds, 2 of which are given to attach to neighbouring carbon atoms, thus it could only bond to 2 other chlorine atoms maximum, not 3. Still very useful video, a lot of help!
How? The carbon on the end is attached to 3 chlorine atoms and one carbon atom which is 4 bonds. The neighbouring carbon atom is attached to 2 carbon atoms and 2 hydrogen? They all add up to 4
@@Prashant-pm7iz no but the 2,2,2 means the chlorine atoms are on the second carbon which is what he is saying isn’t possible as the second carbon is obviously bonded to the first and third carbon
@@-kylejohn-4076 yeahh your right my bad i think it’s cuz I was trying to find where he said that and ended up looking at 4,4,4-trichlorobutenoic acid and I was explaining that
I am literally using you as a teacher because I don't have a good one. I have only 15 days to learn all the content but if my grades do go up its all thanx to you, honestly speaking
This is a fantastic video, but I'm a bit confused with the whole naming thing. I have been taught to add methyll/ethyll when CH3 or C2H5 is present in the long consecutive carbon chain. So say for like one of your first examples, where you ended up getting 2,2-dichloro-1-floro pentane, but I on the other hand have been taught to write it as 2,2-dichloro-1-floromethyllpentane. I looked it up on the text book that follows the new spec and they gave example in the form they wrote/portrayed it in. So I am a bit confused here
hi, i want to ask, for the cholorobutanoic acid example at 27:50 why do you put the 4 in front and not 1. Because I thought that you want the choloro to have the smallest number, so shouldn't you be numbering the chain from the left hand side? thank you
Not sure if im missing something, but I dont think 2,2,2-trichlorobutane is possible since that entails 3x C-Cl bonds and 2x C-C bonds and carbon can only form 4 bonds, not 5. Please let me know if Ive done something wrong here!
quick question for example 17:44 how would you decide which number comes first like the 2,2 correct me if am wrong one of the 2's (2,2- dichloro-1-floropentane) came from the 2 chloro being attached to the long carbon chain and the second two coincidentally came from carbon number 2. however in another question were the chlorine was attached to for example carbon no. 3 would the answer be 2,3- dichloro... or 3,2-dichloro.. question is is which number will be written first
I'm currently doing new spec Chemistry. I just wanted to know if this video is missing anything from the new spec or if it has additional information no longer needed in the new spec.
This video is fab, it is so so helpful but I have a question, you know you talk about finding the 'functional group', and the molecules have more than one functional group, how do you know which one is the 'main' functional group, and which ones are the additional 'things' you spoke about at the start. What if it has a OH (so is an alcohol) , and also has a carbon carbon double bond? Which one would you name first and be the main functional group? Thanks in advance
+Amy This is a tricky one. Generally speaking they won't give you horrible examples in exams. The functional group will be an alcohol, carboxylic acid etc. and the additional groups will be alkyl groups and halogens.
to me you have to find carbon number 1, the first carbon because that could determine the group, the first carbon at 27:18 has a double bonded o on it you say that makes it a carboxylic acid but its also got an alcohol on it soooooooooo how do you know its not an alcohol
+ghetto child No no no no no no. The whole RHS side, what is written as COOH, tells us that it is a carboxylic acid! You need to be able to look at a molecule and determine its functional group! I suggest that you look back through your notes, this video, textbook etc. to make sure that you know all of the functional groups!
+E Rintoul just wondering why you dont say its a haloalkane as it has the haloalkane functional group as well, so why doesn't it end in '-ane'? How do we know which one to put if there are two functional groups?
E Rintoul I'm doing a foundation year in science, it was that, or do another year in college. But I chose that so I can settle into Uni a year earlier. After the foundation year, I will get a choice of 12 different science related degrees. I'm going to go for either Biotechnology or Bioscience, but that could change depending on my interests throughout the foundation year x.
+schrogingers cat You don't name it because it isn't a methyl group. I drew it like that purposely to make the point. If it is part of the longest carbon chain, you do not call it a methyl, rather it just fits into the name. What I have written as its name is correct. Trust me.
if the structural formula is (CH3)2CHCHCH do you put the 2 methyl groups as side chains cause thats what i thought however the answers on questions dont do that
spiderpig818 I certainly can! Functional group isomerism is when the 2 isomers have the same molecular formula but different functional groups. An example would be hexene and cyclohexane (it's probably easiest if you draw them out - cyclohexane has the normal single bond lark, whilst the hexene has a double bond functional group). Positional isomerism is even easier - 1-chloropentane and 2-chloropentane are structural isomers. All that has happened is the chlorine has been moved. That helped?
Hi, thanks for the vid, towards the end, isn't the cyclobutane supposed to be cyclobutene with a double bond as the GF for an Albans is CnH2n+2, but the diagram shown has the CnH2n formula for an alkene
Count from the side with the closest first branch. So if you had a molecule with multiple branches, you'd start counting from the side with a branch closest to that starting carbon. As a quick example, at 10:27 you'd start counting from the left, as that is the side closest to the halogenoalkane group. So you'd get 2-chlorohexane, not 5-chlorohexane
Hi, your videos are great! In the 2,2-dichloro-1-fluropentane example, why isn't the CH3 classed as a Methyl group? Or is that something I've made up? Thanks :)
Hannah Jones Thanks, Hannah! I was being sneaky on that one - mainly because AQA often are too! A methyl group is only a methyl group if it is NOT part of the longest chain. That means that any CH3 that you see on the END of a chain will not be named as a methyl group, provided that it is part of the longest chain of consecutive carbons. Does that help?
I'm away from where I do the videos for the next few days as it's half term, but I'm aiming to get one on alkenes and one on alcohols done on Monday 2nd June. Besides those two, I think most topics are covered...
+Mohammed Suleman It is impossible, because you need to attach the chlorines directly to a carbon, and the carbon can't form three extra bonds (for a total 5). You could split the chlorines up, however (2,2,3-trichlorobutane).
Hello thanks for the help full videos, but I also have a query regarding the naming of the 2nd halogenoalkane why doesn't the ch3 group count as an alkyl methyl group instead part of the parent chain?
This is a trick that AQA love to play - in fact it was in the CHEM 1 exam! By writing the methyl group in its condensed form, CH3, people assume that it is an additional group and so include it as a methyl in the name. However, if the methyl group is on the end of the chain, it isn't a methyl group at all! In the case of the haloalkane on the video, draw it out so that you can see all the bonds. By doing this, you will instantly see that it is just another carbon on the end of the chain! Does that make sense?
Molecules within the same homologous series also have similar chemical properties. Also with 2,2,2-trichloroethane, wouldn't it just be trichloroethane? as the Cl atoms pretty much are on the first C atom, it left me slightly confused when i drew out the molecule and noticed that all the Cl atoms were actually on the first carbon atom. Anyways, this was a perfect video (I drew soooo many organic molecules lol) and the 6 step method is golden thanks!
+Boro Jen xX you wouldn't have 2,2,2-trichloroethane as there is only two carbons in the chain and the carbon number is relative to the functional groups. The IUPAC name if you were to include maximum detail would be 1,1,1-trichloroethane and even then you only need to say it is trichloroethane as the functional groups are always at the lowest numbered carbon. if you had ethane with 3 chlorine bonded to the 1st and 1 to the 2nd it would be tetrachloroethan as it sort of explains itself where the chlorine atoms are.
thank you for the video, there is just one thing I dont understand, why wouldn't the answer for the 2nd example be 2,2-dichloro-1-fluoro-4-methylpentane, becuase there is a CH3 attached to the 4th carbon?
Pattie Boswell If you can link the time it'll help me find it more easily. Is it when I am talking about C4H8? If so, if there is a double bond present, it would have -ene in the name. BUT, a cycloalkane also has a molecular formula like an alkene. BUT, because it only has single bonds, it is a cycloalkAne. That help?
Mizrab James Hi, Mizrab. There's no need for a double bond in cyclopentane. Although it has a formula which suggests it should be an alkene (C5H10 in this case), its cyclic nature means that it is only comprised of single carbon-carbon bonds. That make sense?
a question here in 2021....sir why did you name the carboxylic acid as 4-chloro butanoic acid instead of 1-chloro butanoic acid because it must have the least number...what did you look at to name it
Hi your videos are amazing like probably the only reason i will pass AS :D . I was wondering if you have done a video on isomerism? i can't seem to find it and it confuses me so i was wondering if you could do a video on it if you haven't. if you have could you please send me a link? Thanks
Dakota fireshard Absolutely not. But you may be given molecules that have more carbons and their associated names, but you will NEVER be asked to name molecules that have more than 6 carbons in their longest chain.
Which carbon would be the first one in a cyclo? if I had 2 thing attached to it (Cl and Br)...or would it just be alphabetical and named as BromoChloroCycloButane?
zara4bb I honestly don't know... I would suggest that you go with propanone as the numbering isn't required, therefore it may suggest that you don't actually understand the structure and numbering. I've looked through past papers and can't see a question where the answer was propanone to check. Play it safe and do not write it with a number!
Planet_dais3s Hi! Yeah, that's gonna cost you a mark - alcohols need to be named as propan-1-ol for example. If you stick with the namin conventions in the video, you should be fine!
+Dolapo Olarewaju Be careful with examples like this! The base of the name (meth, eth etc.) comes from the LONGEST CONSECUTIVE carbon chain. When we draw a line to connect the consecutive carbon atoms, we find that the "alkyl" group is included. The exam board will give you examples like this to test whether you really understand how to name! The only time we would name an attached group is if it is not included in the consecutive carbon chain. Does that help?
hey, dont know if I will be of any help to you as you may already have an answer to your question but i will answer it anyway. the answer is no you cannot. this is because the ch3 is NOT a sidechain. we take the longest consecutive carbon chain so we must include it in the main chain. it isnt a side chain so we say pentane (5 carbons). although it being written as ch3 may be misleading and make u think its a side chain however u can draw the ch3 out as a carbon with three hydrogens attached which may make it easier for you. i hope this is of some help. if the ch3 was in the middle of the chain however, it then would most likely be a side chain.
Thank uu! Because of u I got an A * in chemistry and got accepted in Cambridge !!
@@living6671 jealous maybe :P
@@living6671 Perhaps she is right. Why do you come to a conclusion?
Parsa Asadi - OfficialParsa if she did I’m really proud of her 🙏
Khaled Shaik sorry if you got offended I was just guessing 🤦🏻♂️
Aight :-| @Safa Ahmed
Dude, I'm 4 years late but you're an absolute legend for explaining these topics in such an easy-to-understand way, so I thank you for helping with my revision before mocks.
Brooo I'm 8 years late and my a level exam is tomorrow
@@efeonay3803 I hope you do amazing! And even if it's not perfect don't worry , just give it your all and it'll all turn out alright
@@efeonay3803 Lmaaoo I got my exam on Tue and my whole organic section is left :')
Good Video, thanks!
To improve:
Skeletal formula
Didn't mention alphabetical priority
Didn't mention priority within groups: carboxylic acid has higher priority than alcohols so it takes suffix and alchohol becomes prefix.
Didn't mention some of the suffixes like hydroxy for alchohol.
16:40 he told about alphabetical order
At 19:00 he told about hydroxy group
@@reebamin4346 think he meant something like hydroxynitriles
I got a U is AS chem (as did like 90% of my year), so I'm resitting it this year while doing A2 chem, and I can honestly say if I pass AS and A2 chem this year and subsequently get into my chosen uni I'll have you to thank! Your videos are genuinely amazing! Thank you so much for putting your time and effort into them, I owe you one :-)
Rhiana Robinson did you pass?
Nauman Ashraf yes!! and now I'm in my second year studying at my first choice uni!! :-)
which uni?
31sarm plymouth :-)
Amazing Thats great to hear :D. I'm resitting wish me luck ^^
29:13, 2,2,2-trichlorobutane does not exist. The 2nd carbon in the chain can only make 4 bonds, 2 of which are given to attach to neighbouring carbon atoms, thus it could only bond to 2 other chlorine atoms maximum, not 3. Still very useful video, a lot of help!
How? The carbon on the end is attached to 3 chlorine atoms and one carbon atom which is 4 bonds. The neighbouring carbon atom is attached to 2 carbon atoms and 2 hydrogen? They all add up to 4
@@Prashant-pm7iz no but the 2,2,2 means the chlorine atoms are on the second carbon which is what he is saying isn’t possible as the second carbon is obviously bonded to the first and third carbon
@@Prashant-pm7iz what you’re suggesting would be 1,1,1-trichlorobutane
@@-kylejohn-4076 yeahh your right my bad i think it’s cuz I was trying to find where he said that and ended up looking at 4,4,4-trichlorobutenoic acid and I was explaining that
I was thinking that lol
I am literally using you as a teacher because I don't have a good one. I have only 15 days to learn all the content but if my grades do go up its all thanx to you, honestly speaking
how did you do???
@@displayfail5432 She chilling in her grave?
@@alielmi950 well I for one got an E for a level chemistry T_T
@@displayfail5432 how's life going now?
@@karag4487 a law student now cause i can't with sciences :')
turning my grades around ( U's in AS) and you are definitely going to be of help! thank you so much for making these videos
Best nomenclature video on the internet! Thanks for all the effort you have put in :)
Any one revising just reminding, you can x2 the speed and double time your revision.
It wasn't helpful! IT WAS MORE THAT THAT!!!! IT WAS A AMAZING HOW YOU'VE EXPLAINED IT AND it covers this topic in a very simple way. Fab!!! Love.
Yes this is that last part of my chemistry revision for the unit 1 exam Friday! Thank you!
No problem! I hope the exam goes well!
I like how concise these videos are
Hi Sir! I'd like to say thank you for all of these videos, you're a star!
Sang Wangle No problem!
Thankyou! You explained this so well since i missed my chemistry lesson
Mustardshag Excellent! Now stop missing lessons.
These videos are really good! they clear up a lot for me and I love how focused they are and simple to understand. thank you they're really helpful.
Maryam Khanum Thanks very much!
Thankyou for such a well explained video, makes it much easier to understand!
Mr rintoul would you be so kind as to make a video on how to draw skeletal diagrams/formulae please.
This is a fantastic video, but I'm a bit confused with the whole naming thing. I have been taught to add methyll/ethyll when CH3 or C2H5 is present in the long consecutive carbon chain. So say for like one of your first examples, where you ended up getting 2,2-dichloro-1-floro pentane, but I on the other hand have been taught to write it as 2,2-dichloro-1-floromethyllpentane. I looked it up on the text book that follows the new spec and they gave example in the form they wrote/portrayed it in. So I am a bit confused here
at 18:05 wouldn't you have a methlyl group?
Can you possibly do a video on intermolecular forces? I.e Hydrogen bonding, dipole-dipole and van der waals. Great videos by the way :)
Syed Ahmed Thanks! Yeah course, there's a video covering the bonding material coming sometime around September-October!
E Rintoul do you have all videos that cover the whole course of AQA AS chemistry unit 1 ?
E Rintoul has this video been done? The one for intermolecular forces
@@waqarqarshi Yes xx
hi, i want to ask, for the cholorobutanoic acid example at 27:50
why do you put the 4 in front and not 1. Because I thought that you want the choloro to have the smallest number, so shouldn't you be numbering the chain from the left hand side?
thank you
thank u for being my life saver ur vids are so great, btw have u done a vid on optical isomers?
what about amines ? and also primary, secondary and tertiary alcohols ?
Just wondering you know the carboxylic groups (27:06) do they not need numbering because the -COOH group is always at the beginning/end.
Not sure if im missing something, but I dont think 2,2,2-trichlorobutane is possible since that entails 3x C-Cl bonds and 2x C-C bonds and carbon can only form 4 bonds, not 5. Please let me know if Ive done something wrong here!
quick question
for example 17:44 how would you decide which number comes first like the 2,2
correct me if am wrong one of the 2's (2,2- dichloro-1-floropentane) came from the 2 chloro being attached to the long carbon chain and the second two
coincidentally came from carbon number 2.
however in another question were the chlorine was attached to for example carbon no. 3
would the answer be 2,3- dichloro... or 3,2-dichloro..
question is is which number will be written first
Sumiya Elmi Hi, Sumiya. I would say to always arrange the number in numerical order e.g. 1,3,5 not 5,3,1.
That help?
E Rintoul
so are you telling me that the numbers should be in order from smallest to largest.
thanks that helps
Sumiya Elmi Yep, stick with numbers going from smallest to largest!
Ok thank you that was very helpful
awesome explanation. Worth watching love it
I'm currently doing new spec Chemistry. I just wanted to know if this video is missing anything from the new spec or if it has additional information no longer needed in the new spec.
Please will you do a video on mass spectrometer and definitely on intermolecular force, thank you.
Kayalk 97 Intermolecular forces is the next video that I have planned... Watch this space!
This is great! thank you:)
+Sharmin Ahmed I'm glad it helped :)
At 29:10 how can 2,2,2-trichlorobutane exist when the second carbon can only hold 2 chlorine atoms?
It doesn't, it was a mistake.
You could have 2,2,3-trichlorobutane though
17:51 shouldn't there be methyl? Because there is CH3?
No because the chain isn't branched, that methyl is part of the main carbon chain
This video is fab, it is so so helpful but
I have a question, you know you talk about finding the 'functional group', and the molecules have more than one functional group, how do you know which one is the 'main' functional group, and which ones are the additional 'things' you spoke about at the start. What if it has a OH (so is an alcohol) , and also has a carbon carbon double bond? Which one would you name first and be the main functional group?
Thanks in advance
+Amy This is a tricky one. Generally speaking they won't give you horrible examples in exams. The functional group will be an alcohol, carboxylic acid etc. and the additional groups will be alkyl groups and halogens.
to me you have to find carbon number 1, the first carbon because that could determine the group, the first carbon at 27:18 has a double bonded o on it you say that makes it a carboxylic acid but its also got an alcohol on it soooooooooo how do you know its not an alcohol
+ghetto child No no no no no no. The whole RHS side, what is written as COOH, tells us that it is a carboxylic acid! You need to be able to look at a molecule and determine its functional group! I suggest that you look back through your notes, this video, textbook etc. to make sure that you know all of the functional groups!
+E Rintoul just wondering why you dont say its a haloalkane as it has the haloalkane functional group as well, so why doesn't it end in '-ane'? How do we know which one to put if there are two functional groups?
That molecule's name at 3:37, like wow!
+Boro Jen xX Love a long name.
E Rintoul oh hello you! Thanks to your videos, I got into university this year! So a big big thank you to you! x
Boro Jen xX Ah that is fantastic! What are you going to study? Remember though that it was down to you, not me :)
E Rintoul I'm doing a foundation year in science, it was that, or do another year in college. But I chose that so I can settle into Uni a year earlier. After the foundation year, I will get a choice of 12 different science related degrees. I'm going to go for either Biotechnology or Bioscience, but that could change depending on my interests throughout the foundation year x.
Boro Jen xX Well that all sounds excellent! Have an amazing time and do everything that you can! Good luck!
please could you do a video on the skeletal formula
18:02 the methyl isn't named
+schrogingers cat i thought it was 2,2 - dichloro - 1 - fluoro - 5 - methylpentane
demba ba Thank you! :)
If you include the 5th carbon as the chain you can't use it as a functional group aswell
+schrogingers cat schrodeerrrrrr
+schrogingers cat You don't name it because it isn't a methyl group. I drew it like that purposely to make the point. If it is part of the longest carbon chain, you do not call it a methyl, rather it just fits into the name. What I have written as its name is correct. Trust me.
Could you maybe have put the answers to the examples you gave us to do ? Just a suggestion, great videos as always :)
I agree this would be very helpful:)
+Bellatrix Lst Were the answers not there? Apologies. This is a video that needs a re-work in the future so I shall take your feedback on-board!
if the structural formula is (CH3)2CHCHCH do you put the 2 methyl groups as side chains cause thats what i thought however the answers on questions dont do that
Thankyou so much, your videos are great!
Thank u so much this really helped!
Thanks it helped, do you have a video for isomerism please?
Mike Etareh Not just yet, but I'm hoping to get it done tomorrow morning! Fingers crossed!
E Rintoul Just about isomerism can you tell me what the difference between positional and functional isomerism is please?
spiderpig818 I certainly can!
Functional group isomerism is when the 2 isomers have the same molecular formula but different functional groups. An example would be hexene and cyclohexane (it's probably easiest if you draw them out - cyclohexane has the normal single bond lark, whilst the hexene has a double bond functional group).
Positional isomerism is even easier - 1-chloropentane and 2-chloropentane are structural isomers. All that has happened is the chlorine has been moved.
That helped?
skeletal formula please??????????/
Hi, thanks for the vid, towards the end, isn't the cyclobutane supposed to be cyclobutene with a double bond as the GF for an Albans is CnH2n+2, but the diagram shown has the CnH2n formula for an alkene
*alkane not albas
I like your videos!!keep it up
thanks for this video!! keep up the great work!
FangedBeast Cheers!
do you do as ocr biology and would you be willing to put some videos up or if not do you know someone who does☺☺
what about the Skeletal formula
Thanks a lot for this video!! Really simple and easy to understand.
Hey Sir, can you post videos about aromatic chemistry. I am struggling with that topic, thanks.
Absolute G. Thank u for ur videos
How do you know which side to start counting the carbons from? Please helppp
Count from the side with the closest first branch. So if you had a molecule with multiple branches, you'd start counting from the side with a branch closest to that starting carbon.
As a quick example, at 10:27 you'd start counting from the left, as that is the side closest to the halogenoalkane group.
So you'd get 2-chlorohexane, not 5-chlorohexane
I'm watching this in 2025 and it really helped.thank you.
Hi, your videos are great! In the 2,2-dichloro-1-fluropentane example, why isn't the CH3 classed as a Methyl group? Or is that something I've made up? Thanks :)
Hannah Jones Thanks, Hannah!
I was being sneaky on that one - mainly because AQA often are too!
A methyl group is only a methyl group if it is NOT part of the longest chain. That means that any CH3 that you see on the END of a chain will not be named as a methyl group, provided that it is part of the longest chain of consecutive carbons.
Does that help?
Ahh I see! Thank you :)
Great videos very helpful! CHEM2 exam in on the 3/06 could you please upload more videos for that exam.
Thanks Ali
I'm away from where I do the videos for the next few days as it's half term, but I'm aiming to get one on alkenes and one on alcohols done on Monday 2nd June.
Besides those two, I think most topics are covered...
is the 2,2,2-trichlorobutane impossible?
I'm not sure a little help....
+Mohammed Suleman It is impossible, because you need to attach the chlorines directly to a carbon, and the carbon can't form three extra bonds (for a total 5). You could split the chlorines up, however (2,2,3-trichlorobutane).
+Mohammed Suleman That's a typo on my part. It does not exist. But super apologies from me for being rubbish.
+Aidan Woolley Correct.
Hahaha everyone is confused about 2,2,2 -trichlorobutane
Thanks for the video mate! At 28:13 though, why couldn't it be 1, 1, 1, trichloro butanoic acid?
+clark barton Ah right, I'll be rereading this up anyway. Thanks for the help.
Hello thanks for the help full videos, but I also have a query regarding the naming of the 2nd halogenoalkane why doesn't the ch3 group count as an alkyl methyl group instead part of the parent chain?
This is a trick that AQA love to play - in fact it was in the CHEM 1 exam!
By writing the methyl group in its condensed form, CH3, people assume that it is an additional group and so include it as a methyl in the name.
However, if the methyl group is on the end of the chain, it isn't a methyl group at all! In the case of the haloalkane on the video, draw it out so that you can see all the bonds. By doing this, you will instantly see that it is just another carbon on the end of the chain!
Does that make sense?
It really helped alot! Thank you
is it 2-chlorohexane at 14:45 or is it 2-chlorohexane-1,6-dimethyl?
Nvm I didn't hear everything he said 😂
2-chlorohexane it is
At 28:25 where did the 4,4,4 come from for Trichlorobutanoic acid
That’s where I’m stuck
Molecules within the same homologous series also have similar chemical properties. Also with 2,2,2-trichloroethane, wouldn't it just be trichloroethane? as the Cl atoms pretty much are on the first C atom, it left me slightly confused when i drew out the molecule and noticed that all the Cl atoms were actually on the first carbon atom. Anyways, this was a perfect video (I drew soooo many organic molecules lol) and the 6 step method is golden thanks!
***** Oh, I can't seem to see it on my laptop :s. But thanks for letting me know!
+Boro Jen xX you wouldn't have 2,2,2-trichloroethane as there is only two carbons in the chain and the carbon number is relative to the functional groups. The IUPAC name if you were to include maximum detail would be 1,1,1-trichloroethane and even then you only need to say it is trichloroethane as the functional groups are always at the lowest numbered carbon. if you had ethane with 3 chlorine bonded to the 1st and 1 to the 2nd it would be tetrachloroethan as it sort of explains itself where the chlorine atoms are.
massive help, thx a lot!
Boby Gandhi No problem!
Wouldn't 27:51 be 1-chlorobutanoic acid?
thank you for saving my life
thank you for the video, there is just one thing I dont understand, why wouldn't the answer for the 2nd example be 2,2-dichloro-1-fluoro-4-methylpentane, becuase there is a CH3 attached to the 4th carbon?
Please can you do revision videos on OCR A
question:
towards the end of the video you showed us the two different displayed formula for butene. Is the second one cyclobutane or cyclobutene?
Pattie Boswell If you can link the time it'll help me find it more easily.
Is it when I am talking about C4H8?
If so, if there is a double bond present, it would have -ene in the name. BUT, a cycloalkane also has a molecular formula like an alkene. BUT, because it only has single bonds, it is a cycloalkAne.
That help?
E Rintoul 31:42 /35:35
yes it is.
Pattie Boswell Yeah that's where I though. Read my comment and let me know if you have any problems!
You didn't mention anything about naming E and Z structures, or do you go into detail about that in another video?
Amber Pessoa I've not done EZ yet - but it's coming!
E Rintoul When is Alkenes topic coming for Unit 2 Chem AS AQA? (Stereoisomerism (E-Z), Hydration of Alkenes to form alcohols, and addition polymers)
bombarderization Soon... (I hope).
how do you represent a double bond on the cyclopentane? would i just draw two lines? similar to displayed formula?
yes!
Mizrab James Hi, Mizrab. There's no need for a double bond in cyclopentane. Although it has a formula which suggests it should be an alkene (C5H10 in this case), its cyclic nature means that it is only comprised of single carbon-carbon bonds.
That make sense?
is there a magical way of calculating the number of isomers that can be formed?
helpful video! please could you make videos tailored to OCR A A-level Chemistry please?!
is there a video on the nomenclature of cyano- compounds and amino- compounds?
Thank you for teachin so well :)
Thank you for your comment!
a question here in 2021....sir why did you name the carboxylic acid as 4-chloro butanoic acid instead of 1-chloro butanoic acid because it must have the least number...what did you look at to name it
2,2,2-trichlorobutane cannot exist???
Hi your videos are amazing like probably the only reason i will pass AS :D . I was wondering if you have done a video on isomerism? i can't seem to find it and it confuses me so i was wondering if you could do a video on it if you haven't. if you have could you please send me a link? Thanks
Dakota fireshard Hi there! I haven't done one yet, but it's one that will be coming soon! Thanks for the kind words!
E Rintoul just after watching this video a second time i was wondering if we need to know the prefixes for above 6 carbons in the longest chain?
Dakota fireshard Absolutely not. But you may be given molecules that have more carbons and their associated names, but you will NEVER be asked to name molecules that have more than 6 carbons in their longest chain.
hi how u been. just wanted to know what been up to after 5 years😂
Thank you so much, you are amazing 👌
is there any difference between AQA and CIE A level chemistry?
Which carbon would be the first one in a cyclo? if I had 2 thing attached to it (Cl and Br)...or would it just be alphabetical and named as BromoChloroCycloButane?
Sawera Mohammad it is alphabetical
Would you get marked wrong if you wrote propan-2-one?
zara4bb I honestly don't know... I would suggest that you go with propanone as the numbering isn't required, therefore it may suggest that you don't actually understand the structure and numbering.
I've looked through past papers and can't see a question where the answer was propanone to check.
Play it safe and do not write it with a number!
would you get marked down for writing something like prop-2-anol rather than propan-2-ol ? or doesn't it matter ?
Planet_dais3s Hi! Yeah, that's gonna cost you a mark - alcohols need to be named as propan-1-ol for example. If you stick with the namin conventions in the video, you should be fine!
ok, thank you
What if the longest chain did not have the main functional group attached to it? Is that possible?
Why did you name the carboxylic acid with 4,4,4. Shouldn't it be 1,1,1?
Do AS people have to learn naming the ones with the alcohols?
what about naming amines? do we need to know this?
Sam Crossley I do not believe that you do need to at AS, no...
E Rintoul I believe in one of the past papers they asked you to name methylamine, or something along those lines
rockeeben Hmm, possibly. I'm really not sure...
Doesn't matter - amine's were in the exam but there was no naming involved.
Well explained... Thanks
What would be the displayed formula for 2,2,2-tricholorobutane
15:24 I didn't understand
how do you right structural formula of ketones?
I would write propanone as CH3C(O)CH3.
What about Nitrile / Amino functional groups?
+Jack Devin They really only come up at A2 level so it depends where you're at! But yes, they are required.
Where do i find N substituted naming?
can you please finish the videos for organic chemistry.. like amino acids ect.
Thers a new spec is this still good?
Great video. Thanks. :))
***** Thanks for the nice comments again!
+E.Rintoul Why did you not add the alkyl group to this video at 17:47
+Dolapo Olarewaju Be careful with examples like this! The base of the name (meth, eth etc.) comes from the LONGEST CONSECUTIVE carbon chain. When we draw a line to connect the consecutive carbon atoms, we find that the "alkyl" group is included. The exam board will give you examples like this to test whether you really understand how to name! The only time we would name an attached group is if it is not included in the consecutive carbon chain. Does that help?
very helpful⚡️
Sorry I have a QUESTION. Pls help😔
Can I write 2,2-dichloro-1-fluoropentane. As 2,2-dichloro-1-fluoro-3-methybutane.
Because of the CH3 side chain
hey, dont know if I will be of any help to you as you may already have an answer to your question but i will answer it anyway. the answer is no you cannot. this is because the ch3 is NOT a sidechain. we take the longest consecutive carbon chain so we must include it in the main chain. it isnt a side chain so we say pentane (5 carbons). although it being written as ch3 may be misleading and make u think its a side chain however u can draw the ch3 out as a carbon with three hydrogens attached which may make it easier for you. i hope this is of some help. if the ch3 was in the middle of the chain however, it then would most likely be a side chain.
How would you name citric acid and why?
Could you do a video about group 2 elements?
I can certainly try, Muhammad. However I won't be able to look at making it until the day before the exam... watch this space!