aww

the handsome beard dude.. Do u mean professor Dave?

@@captainoaoaoa6908 Ooooh he knows alot about the science stuffff~~~

Eliott rintoul is also up there for chemistry

@@Exhalted1 if you're an a level student especially

@@sparky844 professor dave explains

I'm a Pharm.D student and I'm using his videos!

This so funny to me cause you should learn Med.Chem at Pharmacy School but instead you have to come here for some real help. All the best in Pharmacy School

Where can i get more of such videos please?

@@nathanielukah5058 www.khanacademy.org/science/organic-chemistry/spectroscopy-jay

😂😂😂😂

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.

@@scottwatson6901 " but maybe this will help someone else" I was that someone, thank you king!

i am wondering the same

Bc carboxylic acids have resonance

Because the example wasn't HNMR. He was saying if it was then you would look at the adjacent hydrogen atoms. This is a transcript from my textbook about 13C NMR: "First, no splitting is observed between neighboring carbon atoms because of the low abundance of 13C. The likelihood of a compound having two neighboring 13C atoms is quite small, so 13C-13C splitting is not observed. In contrast, 13C-1H splitting does occur, and it creates significant problems. The signal of each 13C atom nucleus is split not only by the protons directly connected to it (separated by only one sigma bond) but also by the protons that are two or three sigma bonds removed. This leads to very complex splitting patterns, and signals overlap to produce an unreadable spectrum. To solve the problem, all 13C-1H splitting is suppressed with a technique called broadband decoupling, which uses two rf transmitters. The first transmitter provides brief pulses in the range of frequencies that cause 13C nuclei to resonate, while the second transmitter continuously irradiates the sample with the range of frequencies that cause all 1H nuclei to resonate. This second rf source effectively decouples the 1H nuclei from the 13C nuclei, causing all of the 13C signals to collapse to singlets. The advantage of broadband decoupling comes at the expense of useful information that would otherwise be obtained from spin-spin coupling. A technique called off-resonance decoupling allows us to retrieve some of this information. With this technique, only the one-bond couplings are observed, so CH3 groups appear as quartets, CH2 groups appear as triplets, CH groups appear as doublets, and quaternary carbon atoms appear as singlets. Nonetheless, off-resonance decoupling is rarely used because it often produces overlapping peaks that are difficult to interpret. "