Carbon-13 NMR Spectroscopy

[@TheOrganicChemistryTutor]

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[@etoileViral]

Wow, this video is incredibly informative and detailed. The explanation of carbon-13 NMR spectroscopy is clear and concise, covering everything from the basics of broadband decoupled C-NMR to DEPT C-13 NMR spectroscopy. The examples provided, such as 2-butanol and 2-methylbutane, really help to illustrate how to assign chemical shifts to different carbons given the C-13 NMR spectrum. I especially appreciated the discussion on how to propose a structure given the molecule and using factors such as IHD and the number of signals present in the spectrum. The video also does a great job of explaining the different chemical shifts of functional groups, including alkyl groups, halogens, amines, alkenes, alkynes, ethers, alcohols, benzene rings, aldehydes, ketones, esters, and carboxylic acids. The score system for ranking the chemical shifts of sp3 carbon atoms is also very useful. Overall, this video is a must-watch for anyone studying organic chemistry

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Seriously, I attented a whole semester of lectures about nmr spectroscopy (held by a physicist, considered the best of his field) and I did not understand a single thing. After watching this video I am pretty sure I will get through the exam.

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Thank you for providing comedic relief by choosing to place a peak at 69 when you could have easily moved it.

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I can not thank you enough for everything you've taught me God bless you

[@danielgladish2502]

Very helpful and made the concepts very clear and easy to understand. I would like to note, however, that the integration (peak height) of the C13 peaks is the result of the number of protons on the carbon not the number of equivalent carbons.

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[@gordanchew2453]

So how do you explain why at 10:48min why does a secondary carbon has a higher chemical shift than tertiary carbon if they both have a score of 4?

[@scottwatson6901]

Well i'm about 5 months late but maybe this will help someone else... The carbon that has the score of 4 but is neighboring a tertiary carbon will end up having a higher "score". The other carbon with a score of 4 has a neighboring secondary carbon giving it a lower score than the other one. think of the neighboring carbon(s) as a tie breaker in these situations.

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Thanks for the clear explanation!! It helps alot!!

[@soaringred8929]

This taught me more about 13C NMR than 4 years of high school chemistry and 1.5 years of a biochem degree ever have

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You are #1 in NMR, bro!

[@stephpham3507]

im confused. how come around 1:22:00 when he talks about H NMR he's not using the adjacent carbon's hydrogens to determine the split pattern?

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Very helpful and explanatory!

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[@26d8]

For example, #6, wasn't the carbon b a tertiary carbon with a score value of 3 due to 3 primaries around?

[@assialaib1642]

i am wondering the same

[@DzmitryMukha1]

25:00 Why do you call the second carbon in 2-chlorobutane as tertiary, while later naming the first carbon in 1-chlorobutane as primary?

[@mtrav1]

as far as I can tell, he is wrong.

[@muslim19800]

I know too late for you, may be other needs this; it is secondary caron not tertiary... the role is how many carbon atom attached to that carbon, if only one it is primary, if 2 carbon the secondary and so on .... nitrogen has the same principle, how many carbons attached to that nitrogen atom... sorry for the delay

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[@christopherallbright3749]

@TheOrganicChemistryTutor At 29:25 Isnt carbon A a tertiary carbon, making the score of carbon B 4 which would give the higher chemical shift anyways?

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you really helped me,thank youu🥰🥰❤️

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This is so very thorough

[@matteomoioli5210]

First of all, thank you for the perfect explanation, simple and clean. But i want to make a question: why does ketones have more cs than , for example, carboxylic acid? I mean : does not the electronegativity of Oxygen "take off" the electrons from the Carbon atom, reducing his screen for the external magnetic field, causing an increase of chemical shift ? I do not understand that. Thank you an keep it up !

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Bc carboxylic acids have resonance

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Dude, my spectroscopy teacher’s salary should go to your wallet, thank you!

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you are a true legend.

[@lalitasharma6687]

How can we see 13C peaks in a molecule containing large number of carbons? Even though only 1.1% of 13C exist The larger the molecule less likely all Carbon are 13C

[@quanbui7663]

The answer for the ex 10: can be CH3-CO-CH(OH)-CH3 at 1:20:54 ??

[@sarbeshojha4747]

Really very informative.

[@devjyotinath1084]

Very helpful video! Thank you so much. I have a question. Do we get another peak If the adjacent nitrogen protonates for a certain percentage of the molecule (e.g. 10mol% of CH3-CH2-CH2-CH2-NH2 is protonated and form CH3-CH2-CH2-CH2-NH3+; do we see two separate peaks for the adjacent C of the N for these two molecules).

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This guy is a legend

[@chirathdesilva3822]

Can someone explain the 13C of 2,2,4trimethyl-1,3pentandiol.cuz this system wont work for that.and there are similar ch3 groups having different peaks.

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You are amazing.it help me alot

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It's very good video 👍

[@dr.josephnhyiraobessey6908]

Any help please...what's the number of carbons does cyclohezone has on 13 cnmr

[@ProfNajib]

crystal clear, thank you dude

[@asmakhan9442]

Great job...thank you.

[@gordanchew2453]

at 42.04min why is b a quaternary carbon when it is attached to 3 c and 1 o atoms???????????!!

[@mtrav1]

yeah thats definitely a mistake.

[@jandominic1999]

Yeah he‘s definitely wrong there

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are you can do a videos about IR & UV spectroscopy please please 😭

[@SsSss-hq3xp]

On voit tjrs un pic à 78 dans RMN c13 cela signifie quoi ? Et des fois se cache ??

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May be this will help me in the future.

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[@tanmoydutta5039]

Why does 13C have such a wider range as compared to 1H NMR?

[@lh9591]

Can you do some problems that combine IR, H NMR, and C NMR? e.g. formula C5H8Cl2 what is the structure? IR (cm-1): 2950 1H NMR (δ): 1.4 (4H, triplet), 1.2 (4H, triplet) 13C NMR (ppm): 62 (singlet), 26 (triplet), 23 (triplet) i want to cry :( :(

[@yili9857]

very useful : ) one confusion: when you talking about the triple bond group example, I think the carbon with triple bond should be 3° not secondary carbon. Please check~ I learn all chemical analysis stuff by your video.

[@raanoooshh9296]

A carbon with a triple bond cannot be bound to three R-groups and cannot therefore be a tertiary carbon, since a carbon atom cannot form five bonds.

[@jennablue5763]

I was wondering the same thing! Cb should have a score of 5 and Cc a score of 7.

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Pls explain the N+1 splitting pattern for long condensed organic compound and for double, tripple bond

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Sir can you make video on 2 d nmr spectroscopy and please explain tocsy cosy hmbc hsqc spectra ? I will really appreciate it.

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Better than my prof ngl

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How can I cite your video, both in-text and in bibliography

[@shan284shan]

Even though the signal height is proportional to the number of identical H atoms in 1H NMR, in C13 NMR it doesn't work like that. because it affects so many factors that determine the number of identical C atoms present. So the height of a signal is not proportional to the number of identical C atoms in 13C NMR. So are these examples correct? please answer me....

[@arturtoth3185]

Great vid. One thing, it's pronounced "c-uh-pled" not "c-oo-pled"

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very helpful

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Thank you!!! :)

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Why do I even show up to class

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same

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Sir , i have a humble request to u ,can u explain pavia book chapter 6 problem no. -15 plzz sir