R,S system | Stereochemistry | Organic chemistry | Khan Academy
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- เผยแพร่เมื่อ 3 ต.ค. 2024
- How to assign the configuration of a chirality center using the R,S system.
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The best explanations I've ever seen.
khanacademy is saving my butt
amen
Same as me for tonight
as always
You sound like Jim from the Office and it's keeping me going.
one of the best RS SYSTEM video. watch it
Is there a video where you can explain how to mentally rotate the atom if the hydrogen is in the plane? That seems to be my biggest issue with stereochemistry
Matt Nuguid
You just swap the hydrogen for the atom point away from you. The answer that you get will be the opposite of the original molecule's absolute configuration! You're Welcome.
get a model kit fella
Use pencils as bonds if u cant see i did it in class lol
Matt Nuguid he said that its in the khan academy vid "Enantiomers and friends"
I have been struggling to understand this concept, but this video managed to make me crystal clear on this topic the night before my exam. Thank you so much Khan academy
you made it so simple, my OChem professor will love this
HAHAHAHA is he bad?
thank you will be getting an A on my orgo exams thanks to you
did u actually end up getting A? lol
apparently he got a 78 on his first test.
@@rezapahlaviisking no
YOU ARE GODSEND---THANK YOU!
YES YES YES THANK U THANK U THANK U U EXPLAINED TO ME WHAT MY SHITTY LECTURER COULD NOT EXPLAIN TO ME FOR A COUPLE OF LECTURES
Thanks dude, you're great
U r the best chemistry teacher I've ever seen in my life...ur r truly a life saver😍😍
This video saved my life. Was staring at my book trying to figure out what the heck I was reading. This cleared EVERYTHING up!
Thank you very much it helped me a lot
Thank u so much this is the first video iv seen where its properly explained even my lecturer didnt explain it like this. Thanx a million times
you make it very clear. Thank you
Thank u very much & God Bless u!
Ramchandra Shetty u look like a chem teacher who himself doesnt understand what R and s is and so u came to this video to understand it better...
LOLLLLL so true
sir, please explain the R,S system of chiral allenes and it's Fischer projection.
this is the academy where i clear my doubts really,all others say all dash dash......things...
you are the real life saver. I understood in the first 2 minutes. My o chem teacher had a week to make me understand and he FAILED! WOW
seriously yall who is disliking these videos?!
ak lectures
That last trick 👌🏼
Damn this is...AWESOME !!! thanks a lotttttttt man
I was only able to understand R,S system with this video! THANK YOU
where's the video where you explain the R &S Rotation ???!
Thanks you very much im a palestinian pharmacy student and im understand your explain you are very very good and i prayer to my god give you your hope and your want ❤❤
love that little trick at the end - thanks!!!
Bless you for saving me from my pedagogical sin of a class.
Tysm... It has help me out within nine mins to understand it properly. Hope to c further more
Khan Academy is a saviour! Thank you.
Your explanation better than my teacher........ thanks
Khan I thought you'd come with some harder examples. My exams are nothing like this kiddy stuff honestly.
Very helpful👍👍
THANK YOU SO VERY MUCH! ... from Thailand
KHAN, YOU GUYS ARE THE BEST!!!!
Thank u ,That's well explained.
thank you so much!
Thank you!!! 2m in and I get it way more than 30m research elsewhere!
you da man
@ 3:18 how do we know that the hydrogen is present ? We did'nt represent it in the fig.
Who has a test on this tomorrow, and looking through these comments?
Thank you
Thanks a bunch sir!
may God bless u people
Amazing thanks!
nice try dude, thanks for this video, it's make me easier to study stereoisomer autodidact
Thanks. Great video.
Thanks 🌹
THANKS
Well explained..
Nice ways to teach us....
Get efficient knowledge👍
Incrediple man 👌
Thank you so much , that really helped me a lot !! :D :D
Thank u so much 👌🏻💙💙
Excellent video
Good stuff but seriously, the audio is TOO LOW. I have my volume all the way up and it still sounds low.
Is there a video where the L, D system is explained?
d- and l- system is comparatively easier than this
Informative
How do you do this when there are two chiral centers??
consider one center at a time, and treat the four of its connections without worrying about their chiralty
thankssss.....
Thank you. :)
Cheers!
If all enantiomer are pairs where they are mirror images, non-superimposable, and one has to be R the other S configuration, does this mean the last example where both are S configuration are not enantiomers of each other despite isomerisation?
Best one
I don't understand the last part about looks R but is actually S, when do you use that trick? when the main prioritized group is pointing back? someone please help my test is coming up soon😭😭
giyekari in order to identify whether R or S, the hydrogen needs to be pointing away from you. If you come across a molecule where H is pointing towards you, you can still determine the order and whether it's going clockwise or counterclockwise, to determine S or R. Now once you have done this, remember, since the H is towards you, and for example, if you found it was S....all you have to do is choose R for your answer. Being only 2 options (R or S), and only 2 directions (counter and clockwise), the most logical explanation would be the direct opposite of the wrong answer. Hope this makes sense.
When the H is coming towards you in space and not away from you.
What if the priority of number 1 and 4 is on same plane... Should we convert it?
If the configuration of two structures are same then what type of isomer will they be?
Thank you man...!
Can you pls explain the R&S confgration of ergot alkaloid...plss must rply meee
Learning RS nomenclature 12 hours before IIT JEE is the weirdest shit I've ever done.
Also I didn't know you guys pronounced enantiomers with a hard t.
How can we determine R or S for no 2 chiral carbon of glucose.
What if the dash has no label...nothings written on it..just dash attached to the parent chaim
I've a question. for the ethyl group, do we don't need to add all the atomic number of all element. I mean like C2H5. C is 6 so multiple by 2 is 12 and add 5 because of the 5 hydrogen atom. So it will be 17. compared to OH equal is 9. So, ethyl group is more priority compared to OH group. am I right? Is it my method is wrong? Or it need to compare with same level of functional group? comparing methyl with ethyl and only? you know what I mean right? I really need your help
haziqah nasir this was my thought as well, but I think it's the atom directly bonded that dictates the priority, so because oxygen has a higher atomic number than carbon, it takes priority
Ollie Bingham okay thanks😊
@1:35 why do you ignore the hydrogen?
why lowest priority group is always kept at the dash line
Lowest priority group can be place along a plane or above the plane or bellow the plane
What if the H atom lies in left or right of the chiral centre...
Anyone Plz reply
in the second example of 2 butanol how to know if the hydrogen is already projecting away?? someone help me..
Rupesh
I also want to know this, the only phenomena bounced back 😑
If OH is coming out from screen then obviously one hydrogen will be behind as other two carbon attached to it are in plane.
👏👏👏
So for the last one both of them are s?
Hey in school we learnt something about (Z) And (E) so is it the same thing or what?
That deals with trisubstituted or tetrasubstituted alkenes, but it’s still related to stereochemistry in a way. You can’t rotate about the double bond, but the substituents can be oriented so that the highest priority components are on the same (Z) or opposite (E) sides of the double bond.
@@woodchuk1 ily thank you (•ω•`)o
how to give priority to binaphthol
how is it( s) n-butanol ?????????/
I have the midterm so fucking soon 😭😭😭😭😭😭😭😭😭😭
away from the lesson am confused about the pronunciation of "enantiomers"; is it enanTiomers or enanSiomers ?
Actually Enanshiomers*
oh really i didn't know that, i kept pronouncing it enanSiomers throughout the whole year tnx.
😂 yw
1:34
BlueSkyNoise Hahahaha. Nice!!!
Studying for the MCAT and I'm having to relearn all of this smh
Hi , Dr.Hayek lol
In the first example you say its R and then you take the same example and say its S ... i dont quite get it
Hi bae
Subtitle indonesia
theyre way too simple i need some with ethenes
i cant understand last part of this lecture looking R
voice quality is poor otherwise nice explanation
Yoo I was starting to lose hope of understanding this lmao
habaltonaaaaaaaaaaaaaaaa
The explanation for the last bit of the video is terrible. There needs to be a better way of describing what to do when the lowest priority group is facing you and how to correct it.
is anyone else annoyed by the way he enunciates the "-ty" in priority?
The WOMEN . ARE NEXT.NDJ
Say it with me: "hy-dro-gen" not "hy-der-gen"
THANK YOU!! You are freaking lifesaver!