S. Michael Stewart
S. Michael Stewart
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วีดีโอ

Cannizzaro Reaction: Isolation of benzoic acid product
มุมมอง 7642 ปีที่แล้ว
Cannizzaro Reaction: Isolation of benzoic acid product
Cannizzaro Reaction: Test for unreacted aldehyde
มุมมอง 1042 ปีที่แล้ว
Cannizzaro Reaction: Test for unreacted aldehyde
Cannizzaro Reaction: Admittedly bad video of the melting point measurement
มุมมอง 202 ปีที่แล้ว
Cannizzaro Reaction: Admittedly bad video of the melting point measurement
Cannizzaro Reaction: Setting up the reaction
มุมมอง 362 ปีที่แล้ว
Cannizzaro Reaction: Setting up the reaction
Cannizzaro Reaction: Theory on how to separate the products
มุมมอง 1482 ปีที่แล้ว
Cannizzaro Reaction: Theory on how to separate the products
Cannizzaro Reaction: Running the reaction
มุมมอง 832 ปีที่แล้ว
Cannizzaro Reaction: Running the reaction
Cannizzaro Reaction: Separatory funnel and isolation of products
มุมมอง 2002 ปีที่แล้ว
Cannizzaro Reaction: Separatory funnel and isolation of products
Cannizzaro Reaction: Theory
มุมมอง 622 ปีที่แล้ว
Cannizzaro Reaction: Theory
CS50 Final Project
มุมมอง 1032 ปีที่แล้ว
CS50 Final Project
ReviewOfAMethodsSection
มุมมอง 122 ปีที่แล้ว
ReviewOfAMethodsSection
Title Slides
มุมมอง 342 ปีที่แล้ว
Title Slides
TextFormatting
มุมมอง 432 ปีที่แล้ว
TextFormatting
Results
มุมมอง 302 ปีที่แล้ว
Results
Methods
มุมมอง 382 ปีที่แล้ว
Methods
Conclusions
มุมมอง 3432 ปีที่แล้ว
Conclusions
Review of a Methods Section version 1
มุมมอง 32 ปีที่แล้ว
Review of a Methods Section version 1
Review of a Methods Section
มุมมอง 192 ปีที่แล้ว
Review of a Methods Section
Oxidation and Reduction: Thin Layer Chromatography of the benzophenone product
มุมมอง 2552 ปีที่แล้ว
Oxidation and Reduction: Thin Layer Chromatography of the benzophenone product
Oxidation and Reduction: Qualitative testing of the benzophenone product
มุมมอง 232 ปีที่แล้ว
Oxidation and Reduction: Qualitative testing of the benzophenone product
Oxidation and Reduction: Oxidation of diphenylmethanol with hypochlorous acid
มุมมอง 1822 ปีที่แล้ว
Oxidation and Reduction: Oxidation of diphenylmethanol with hypochlorous acid
Oxidation and Reduction: Thin Layer Chromatography of Product
มุมมอง 1102 ปีที่แล้ว
Oxidation and Reduction: Thin Layer Chromatography of Product
Oxidation and Reduction: Qualitative Tests
มุมมอง 92 ปีที่แล้ว
Oxidation and Reduction: Qualitative Tests
Oxidation and Reduction: Isolating the final oxidation product
มุมมอง 112 ปีที่แล้ว
Oxidation and Reduction: Isolating the final oxidation product
Carbanion vs Carbonyl Chemistry
มุมมอง 572 ปีที่แล้ว
Carbanion vs Carbonyl Chemistry
Dieckmann Condensation/Reaction
มุมมอง 552 ปีที่แล้ว
Dieckmann Condensation/Reaction
Robinson Annulation Revisited
มุมมอง 252 ปีที่แล้ว
Robinson Annulation Revisited
Responses to the Simmons-Smith Video
มุมมอง 1172 ปีที่แล้ว
Responses to the Simmons-Smith Video
Michael Reaction Revisited
มุมมอง 492 ปีที่แล้ว
Michael Reaction Revisited
Diels-Alder Synthesis: Isolation of product
มุมมอง 1502 ปีที่แล้ว
Diels-Alder Synthesis: Isolation of product

ความคิดเห็น

  • @ts37924
    @ts37924 หลายเดือนก่อน

    even though you named it correctly the logic isnt that triple bond has more priorty infact it is the opposite in many cases here we start naming form the triple bond because of the lowest locant rule which comes before alphabetical order.

    • @StubbornAlchemist
      @StubbornAlchemist หลายเดือนก่อน

      not quite - the most reactive functional group almost always sets the anchor point in the molecule in IUPAC, except for carboxylic acids, which is more a reflection on this historical naming of these compounds. When we developed our own material for this course, we found that you can get into false equivalencies when looking at naming as many textbooks happen to pick examples where the priority is usually closest to the end of the chain making the numbering also lower, so it looks like the higher rule is the numbering and not the reactivity. this becomes apparent for more complicated molecules, but with more complicated molecules it also becomes apparent that while IUPAC is well meaning, the reality is there are a myriad of flavors for naming and they look a lot like IUPAC but aren't. a great example of this is "diphenylmethanol" - this looks a lot like IUPAC but the longest chain is actually the benzene ring so the name is really (1-phenyl-1-hydroxymethyl)-benzene. the theme that shows up with these alternative naming schemes is that simpler is better. as such we use IUPAC until it becomes unnamable, then we just jump to whatever works easiest.

    • @ts37924
      @ts37924 หลายเดือนก่อน

      @@StubbornAlchemist oh alright thanks alot

  • @bic1349
    @bic1349 หลายเดือนก่อน

    THANK YOU!!! Subscribed!

  • @Xperimenter
    @Xperimenter 2 หลายเดือนก่อน

    I get it! Thanks :)

  • @Afshan14-o3p
    @Afshan14-o3p 3 หลายเดือนก่อน

    Very useful

  • @EricaColey-d4j
    @EricaColey-d4j 4 หลายเดือนก่อน

    The should be C5H12

  • @d0jj
    @d0jj 4 หลายเดือนก่อน

    2:52 No it is not unlikely, the proportion of spin up vs spin down atoms in a given sample is only something like 50.1%

  • @manishamishra3993
    @manishamishra3993 5 หลายเดือนก่อน

    I'm here after watching your "Olifin metathesis" video....that trick is very helpful for the calculation of possible products. Nice explanation... Thank you so much sir ❤️ Keep it up 👍

    • @StubbornAlchemist
      @StubbornAlchemist 5 หลายเดือนก่อน

      I'm glad you like it! And thank you for the kind words!

  • @bananabobanana6035
    @bananabobanana6035 6 หลายเดือนก่อน

    Super clear video, ur drawings are great. Thank you!!

    • @StubbornAlchemist
      @StubbornAlchemist 6 หลายเดือนก่อน

      @bananadobanana6035 thanks for the positive feedback, I really appreciate it

  • @Mohamed-xz1fq
    @Mohamed-xz1fq 6 หลายเดือนก่อน

    It all the halogene can do anti markovnikove on it or anly hbr ?

    • @ChemicalAlchemist
      @ChemicalAlchemist 6 หลายเดือนก่อน

      Any HX (so X = Br, Cl, I) can do anti-markovnikov if you use peroxides or light to encourage a free radical mechanism. in fact most markovnikov reactions have some anti-markovnikov equivalent, so water addition (HX where X = OH) can be done anti-markovnikov using hydroboration oxidation. thanks for asking

  • @shamikpandey456
    @shamikpandey456 8 หลายเดือนก่อน

    Thanks sir

  • @Alex_fruc
    @Alex_fruc 8 หลายเดือนก่อน

    Thanks bro

  • @andrewjustin256
    @andrewjustin256 9 หลายเดือนก่อน

    Isn't it the "Law of mass action" or Kc equation?! Because I feel like it is!

    • @StubbornAlchemist
      @StubbornAlchemist 9 หลายเดือนก่อน

      Law of Mass Action dates back to the 1850s and is the progenitor to a lot of this, but in a lot of ways it's an empirical approach to this concept. Looking at reversible reactions they could see that adding reactants drives the forward reaction, but there was no good explanation for this. So it would be misleading to say that this it the law of mass action - law of mass action gives this outcome but doesn't provide a framework beyond empirical experiments. The more rigorous definition of the reaction quotient, Q, is the better explanation, with the requirement that Q = Kc (or Keq, which is the more modern take on K) at equilibrium

    • @andrewjustin256
      @andrewjustin256 9 หลายเดือนก่อน

      @@StubbornAlchemist I am sorry you lost me there; are you trying to approve or disapprove my question? Because I thought this is the stepping stone towards the Law of Mass Action because we know the rates are equal and the ratio of of the rate constants is turn out to be Kc.

  • @jacobvandijk6525
    @jacobvandijk6525 11 หลายเดือนก่อน

    @ 1:02 in MRI, the sample is a human body. But usually, the patient isn't dropped in the scanner, haha.

    • @StubbornAlchemist
      @StubbornAlchemist 11 หลายเดือนก่อน

      details details

    • @jacobvandijk6525
      @jacobvandijk6525 11 หลายเดือนก่อน

      @@StubbornAlchemist No, I don't give details of this dropping of a patient in a scanner ;-)

  • @stevelow7900
    @stevelow7900 11 หลายเดือนก่อน

    Hi may I know how to find the overall reaction order for reversible reaction?

    • @StubbornAlchemist
      @StubbornAlchemist 11 หลายเดือนก่อน

      I believe you just add all the orders up for both the forward and reverse terms, though it's not been my experience that the overall order is meaningful for reversible reactions and honestly it's not a calculation I've ever done.

    • @stevelow7900
      @stevelow7900 11 หลายเดือนก่อน

      @@StubbornAlchemist so let say if the forward reaction has order 1 and reverse reaction has order 2, the overall order shld be 1 - 2 = -1?

    • @StubbornAlchemist
      @StubbornAlchemist 11 หลายเดือนก่อน

      @@stevelow7900 I think that is correct, but to be honest I don't think there is a physical meaning for overall order for reversible reactions. for irreversible the order sort of makes sense as it can directly translate into pressure dependence, which is directly observable. but for reversible reaction the observed order will depend on the ratio of products and reactants. sorry to give you such a non-committal answer but I just haven't seen much on this topic.

    • @stevelow7900
      @stevelow7900 11 หลายเดือนก่อน

      @@StubbornAlchemist Oooooooo I was quite shocked too haha bcoz I saw this qn in my uni assignment but it wasn't covered in lecture and I can't find anything on internet that talks about the overall order for reversible reaction. Anyways, thank you soooo much for the detailed explanation!!

    • @StubbornAlchemist
      @StubbornAlchemist 11 หลายเดือนก่อน

      @@stevelow7900 glad I could help

  • @s4w_ApeX_official
    @s4w_ApeX_official ปีที่แล้ว

    Thanks respected sir thanks for reply I am so happy and felling pleasure I was just waiting for your reply And the spider man is my dream

  • @TheShokan22
    @TheShokan22 ปีที่แล้ว

    why would the tertiary radical be less stable?

    • @StubbornAlchemist
      @StubbornAlchemist ปีที่แล้ว

      tertiarys are more stable, I just misspoke.

  • @s4w_ApeX_official
    @s4w_ApeX_official ปีที่แล้ว

    Hello sir can I talk to you May you please give me your reply You are brilliant teacher and I love chemistry And I Love Tom Holland Sir please reply to me I will show you the pic

    • @StubbornAlchemist
      @StubbornAlchemist ปีที่แล้ว

      I don't need the pic, but sounds like you have good taste in Spidermen

  • @s4w_ApeX_official
    @s4w_ApeX_official ปีที่แล้ว

    Hello sir I am an Indian student of yours and i am big fan of spider man

    • @StubbornAlchemist
      @StubbornAlchemist ปีที่แล้ว

      but which version of spiderman? Tom Holland? The Japanese direct to video?

    • @s4w_ApeX_official
      @s4w_ApeX_official ปีที่แล้ว

      @@StubbornAlchemist No sir is not Japanese version Is marval movie spider man Tom Holland Don't you know that I am just shearing my feelings which is for him My name is mnu please reply

    • @s4w_ApeX_official
      @s4w_ApeX_official ปีที่แล้ว

      Hello sir can I talk to you May you please reply to me You are brilliant teacher and I love chemistry subject and I love Tom Holland Please 🙏 reply

  • @epsilon47
    @epsilon47 ปีที่แล้ว

    I love how the underlying logic behind why all this occurs is basically 'voodoo sorcerey' ha ha. Very thoroughly-explained video though, thanks!

  • @chickenpopper
    @chickenpopper ปีที่แล้ว

    🎵And after all, you're my Van Der Walls. 🎵

    • @StubbornAlchemist
      @StubbornAlchemist ปีที่แล้ว

      hey buddy, the staff at Guitar Center warned you

  • @Hi_mapleD
    @Hi_mapleD ปีที่แล้ว

    Thanks bro Helps a lot

  • @westonteece5339
    @westonteece5339 ปีที่แล้ว

    i was looking for something to understand the shouldering affect, and it seems that the quartet of quartet idea just established that, thanks so much.

  • @user-eq8ng5ix2v
    @user-eq8ng5ix2v ปีที่แล้ว

    Nice explanation

  • @scholzenpascal7722
    @scholzenpascal7722 ปีที่แล้ว

    Good video for understanding the splitting patterns! Regarding the origin and understanding of the J-coupling, there is a property of nuclear spins in NMR that you don't seem to be aware of and it is the fact that both 1H nuclear spin states are almost equally populated inside a sample. As you said, there are 2 possible orientations of a 1H nuclear spin with respect to the external magnetic field, with different energy levels: ↑ and ↓. The population difference between these two states inside a sample is defined by Boltzmann's law: N↓/N↑ = exp(-E/kT), with E = h γ B the difference between the two energy levels. From this law, one can calculate that the population difference is actually very small, even inside a strong external magnetic field (<0.1% even for 1GHz magnets). As a result, also only a small amount of nuclear spins are excited perpendicular to the external field during an NMR experiment. ** To sum up: during the entirety of an NMR experiment, the number of ↑ and ↓ 1H spins inside a sample is basically the same and randomly distributed, thus explaining your comments 2:50 and 4:05. **If one goes beyond the vector model, the nuclear spins aren't actually excited to a state perpendicular to the external field, it is more a question of coherence, but no need to go that far in the theory to understand J-coupling

    • @StubbornAlchemist
      @StubbornAlchemist ปีที่แล้ว

      Aware of since I took a graduate course in NMR, but for this level I try to keep it simple enough that not too many important details get glossed over. Relying on boltzmann distributions to describe spin populations seems a bit optimistic for a sophomore level organic course. but thanks for your feedback

  • @fatimaalzahraa6624
    @fatimaalzahraa6624 ปีที่แล้ว

    Hi thank u for the nice explanation i just have a question do the 2 carbon atoms rotate at the same time or just only 1 carbon rotates withrespect to the other

    • @StubbornAlchemist
      @StubbornAlchemist ปีที่แล้ว

      it's better to think about it that way - they can both technically be rotating, but really it's just one turning relative to the other one

  • @McKronenberg
    @McKronenberg ปีที่แล้ว

    So "quartett of quartetts" for the CH2 in Propane, wouldnt that in the spectra then just look like a Septett ?

    • @StubbornAlchemist
      @StubbornAlchemist ปีที่แล้ว

      A quarter of quarters would be four peaks each split into 4 peaks - so 16 total peaks - whereas a septet would be just 7. When it splits that much you'll generally see people write "multiplet" because, while it's truly a quartet of quartets, in practice each peak would only be 4-8% of a single proton signal (so less than 1% of the signal of two methyl groups creating it), so unless your signal-to-noise (S/N) is incredible, it'll just be a bunch of bumps against the baseline.

  • @sohammandal-gp4fp
    @sohammandal-gp4fp ปีที่แล้ว

    according to some texts dihedral angle is only valid if the two half planes contains two sets of three atom having two atoms in common.in that case what will be the dihedral angle in 1,1,1 trichloro ethane staggered newman projection.according to the above definition it will not be defined.actually it is a pyq of a indian entrance exam ,and ans provided in internet is 60 degree.i will be very pleased and grateful if you reply

    • @StubbornAlchemist
      @StubbornAlchemist ปีที่แล้ว

      As for the definition you've provided, this is the generally used one in chemistry, though I know you can come across a few others in computation chemistry and mathematics. In the lowest energy configuration I would agree that the angle would be gauche (60 degrees) as it would minimize steric interference between atoms on the adjacent carbons. I have a couple of videos on this; th-cam.com/video/7QACswGsSO8/w-d-xo.html and th-cam.com/video/aFbtBNMKYP4/w-d-xo.html

  • @emelycambray6005
    @emelycambray6005 ปีที่แล้ว

    Great work

  • @michellemar8442
    @michellemar8442 ปีที่แล้ว

    Please find the dihedral angle at BF3 and C2H2

    • @StubbornAlchemist
      @StubbornAlchemist ปีที่แล้ว

      For BF3 there are no dihedral angles because there is only one central atom but the bond angles are 120-degrees. For C2H2 there are also no dihedral angles because the entire molecule is linear.

  • @shivshankarahirwar1714
    @shivshankarahirwar1714 ปีที่แล้ว

    Madhar chod englandian bsdk

  • @noname6284
    @noname6284 2 ปีที่แล้ว

    Does it really matter if the double bond was inward or outward the shape

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      For elimination to occur by an E2 mechanism the leaving group and the associated H on the adjacent carbon have to anti-periplanar - meaning on opposite sides of the carbon-carbon bond (which is being converted to a double bond). So technically yes, but for linear alkanes this can be overcome as the molecule can rotate around single bonds, this is will just have implications on your final stereochemistry. For rings, this means a hydrogen must be trans to the leaving groups for E2. If you have E1, such as acid catalyzed dehydration of alcohols, then it doesn't matter as the hydrogen isn't removed at the same time as the leaving group.

  • @stefanurniaz9544
    @stefanurniaz9544 2 ปีที่แล้ว

    Good video, thank you!

  • @_A.Trader
    @_A.Trader 2 ปีที่แล้ว

    Simple, Thoroughly Detailed, Visually Demonstrated, Straight to The Point Lesson; you sir have mastered the art of teaching. Thank you for your service. 👍🏾

  • @ashimehta2500
    @ashimehta2500 2 ปีที่แล้ว

    Your videos seem to be under appreciated! 😔I love that they are short and sweet, and at the same time have all the info needed. Just what is necessary, no other bs. Hope your channel grows!!

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      Thanks, I really appreciate the comment.

  • @yup2427
    @yup2427 2 ปีที่แล้ว

    Simple and to the point. Thanks!

  • @praveshjangid2336
    @praveshjangid2336 2 ปีที่แล้ว

    Nice teaching Thank u sir 🙏

  • @vibessz21
    @vibessz21 2 ปีที่แล้ว

    It's quite good ... Can you please tell what are the bulky groups which resist flipping

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      pretty much any group that have more than 3 carbons in it, such as tert-butyl and isopropyl groups, or any long chains that come off the ring.

    • @vibessz21
      @vibessz21 2 ปีที่แล้ว

      @@StubbornAlchemist thanks alot

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      @@vibessz21 you're welcome

  • @wilhellmllw3608
    @wilhellmllw3608 2 ปีที่แล้ว

    Great explanation!

  • @abhisheksharma-ge3im
    @abhisheksharma-ge3im 2 ปีที่แล้ว

    Gajjjjjab explain

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      what do you need explained?

    • @vibessz21
      @vibessz21 2 ปีที่แล้ว

      Gajjab in hindi means it's superb

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      @@vibessz21 oh well, thank you then I appreciate it

  • @shanthala1345
    @shanthala1345 2 ปีที่แล้ว

    Thank you sir i thought this was planar, iam learning to draw plane of symmetry for compounds to understand if it's optically active ,this helped me

  • @jadmahdi6953
    @jadmahdi6953 2 ปีที่แล้ว

    can you do one with dienes, for the s-cis and s-trans

  • @rashadalam2879
    @rashadalam2879 2 ปีที่แล้ว

    Can you make a video n confirmation of cyclohexane

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      here you go th-cam.com/video/XXS23VYCjFM/w-d-xo.html

  • @broskibros1229
    @broskibros1229 2 ปีที่แล้ว

    So the stereochemistry can be wedged on either the bonds attached to the new carbon or the 2 bonds that were previously connected together by a double bond?

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      correct - you'll end up with both chiralities, so both wedged or both dashed

  • @vinayakkasundra1912
    @vinayakkasundra1912 2 ปีที่แล้ว

    Thanks a lot sir for explaining the stereo-chemistry part of this reaction. Love from INDIA.

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      तुम्हारा बहुत स्वागत है

  • @Dev-tf2bx
    @Dev-tf2bx 2 ปีที่แล้ว

    hey are they strong O.A. or weaker ..? by seeing that u just oxidise once , i thing they might be weak O.A. , but please tell me :) , thanks !

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      they are a weaker oxidizing agent, which is why they can't convert a primary alcohol into a carboxylic acid and instead only into aldehydes. They are effectively Jones reagent (chromic acid) that has been poisoned with chlorine to make it a weaker AO, much like the Lindlar catalyst is a poisoned Pd catalyst that can't hydrogenate as well.

  • @doodoobearlove
    @doodoobearlove 2 ปีที่แล้ว

    thanks for sharing!

  • @thinkdesk2801
    @thinkdesk2801 2 ปีที่แล้ว

    How can you use PV =RT when n is changing due to vaporization?

    • @StubbornAlchemist
      @StubbornAlchemist 2 ปีที่แล้ว

      Clausius-Clapeyron assumes equilibrium has been established, which is reasonable if let the pressures equilibrate in contact with a heat source (e.g., measuring vapor pressure by measuring the pressure of a sealed vessel in a hot water bath). For transient systems, it's a let a more complicated and you'd have to know the dH (heat of vaporization) to even solve those kinds of problems.

    • @thinkdesk2801
      @thinkdesk2801 2 ปีที่แล้ว

      @@StubbornAlchemist I don't have sufficient knowledge to understand that, but actually I figured it out. n/V (and, hence P/RT) is constant here and deltaH is changed from enthalpy to enthalpy per mole somewhere in the derivation. Hope I am right.

  • @ashwinnmuthu81
    @ashwinnmuthu81 2 ปีที่แล้ว

    Superb 👌

  • @ryan._verma
    @ryan._verma 3 ปีที่แล้ว

    Thanks