Really good explanation very clear- just one issue, you state if an atom has "even nucleons" it doesn't have an NMR. This is not correct, a common example is 2H (deuterium 1p and 1n) 2H is NMR active, commonly used on nearly every solution NMR experiment (the NMR spectrometer "locks" to the 2H frequency) and when students do higher level this causes confusion. A simplification is fine but it should always be correct. Suggested wording should be "an even number of protons AND an even number of neutrons does not have an NMR signal" hence Carbon-12 (6p and 6n is correctly stated as having spin-0) . This avoids having to give details but is still correct, keep up the fantastic videos!
Thank you, sir. This is very easy to understand. I hope you will upload other videos with harder NMR questions :) Every passer-by please check this out!
Hello, thanks for the great video, it was really helpful. However, I do have a query. At 16:10, where does the peak for the -OH go in the molecule? I didn't really understand that bit, could you please explain? Thank you again.
This gets a little complicated. The simple answer is: The H in the -OH is often not visible and this is often the case for anything attached directly attached to an Oxygen or sometimes a N (eg NH).The reason is anything attached to a heteroatom such as O or N is "exchanging" this causes the signal to become broad and sometime so broad it vanishes. The exchange rate is affected by all sorts of things such as the solvent, pH or temperature so sometime you see them plonk it in d6-DMSO and you probably will. I think for all the examples at A-level the rule of thumb is -OHs are invisible. Additionally this is also the reason they do not couple or count for the n+1 rule.
because there is supposed to be an alkyl chain but we dont know how long, since there are only 4 carbons, two of which are bonded and another one that is supposed to be in a double bond, that only leaves one carbon hence CH3
8:06 YOU NEED TO SORT THIS OUT. IN MY 23 YEARS OF LIVING AS A CHEMIST I HAVE NEVER, EVER, IN MY LIFE SEEN A CARBON "DOUBLE BONDED😱😱😨😰" TO A HYDROGEN 🤯🤯🤯🤯🤯🤯🤯 THIS MATTER IS NOT OVER SCIENCE SHORTS UNTIL ONE OF US DIES AND I HAVE NEVER DIED BEROFRE. EMBRARESING
I've watched multiple videos for NMR and this is the only one which cleared my concepts, thank you so much!!
just watched this 5 mins before chem paper 3 and I got the nmr right cuz of this
cold
it's an 18 min video 😂
@@michealadeleye74765 mins before the exam*
Thank You for saving my physics preperation, your videos were the only thing I needed to prepare for my A levels.
what grade did you get?
This is better explained in 18 minutes than what my chem lab prof spent 4 hours trying to say. Sheesh, and thank you.
was helpful!!!
Im sitting my A levels finals 7 days from now hoping an easy nmr question to appear!!!!!
Really good explanation very clear- just one issue, you state if an atom has "even nucleons" it doesn't have an NMR. This is not correct, a common example is 2H (deuterium 1p and 1n) 2H is NMR active, commonly used on nearly every solution NMR experiment (the NMR spectrometer "locks" to the 2H frequency) and when students do higher level this causes confusion. A simplification is fine but it should always be correct. Suggested wording should be "an even number of protons AND an even number of neutrons does not have an NMR signal" hence Carbon-12 (6p and 6n is correctly stated as having spin-0) . This avoids having to give details but is still correct, keep up the fantastic videos!
Thank you for the correction!
Sorry for the reupload!
Thanks so much for the great content! I really do think that you should delve into more chemistry in tandem with your amazing physics videos.
Thank you, sir. This is very easy to understand. I hope you will upload other videos with harder NMR questions :) Every passer-by please check this out!
HA, for a channel named Science Shorts, your explanation sure wasn't lacking in substance! Thanks so much for all that info
nah I give up...this topic just doesn't make any sense
Same 😢😢
Hello, thanks for the great video, it was really helpful. However, I do have a query. At 16:10, where does the peak for the -OH go in the molecule? I didn't really understand that bit, could you please explain? Thank you again.
This gets a little complicated. The simple answer is: The H in the -OH is often not visible and this is often the case for anything attached directly attached to an Oxygen or sometimes a N (eg NH).The reason is anything attached to a heteroatom such as O or N is "exchanging" this causes the signal to become broad and sometime so broad it vanishes. The exchange rate is affected by all sorts of things such as the solvent, pH or temperature so sometime you see them plonk it in d6-DMSO and you probably will. I think for all the examples at A-level the rule of thumb is -OHs are invisible. Additionally this is also the reason they do not couple or count for the n+1 rule.
your voice is so nice
Focus
This is a really good video! Thank you.
7:46 how do u know that there’s another carbon to the right?!?!
because there is supposed to be an alkyl chain but we dont know how long, since there are only 4 carbons, two of which are bonded and another one that is supposed to be in a double bond, that only leaves one carbon hence CH3
8:06 bro said fairly simple, and its gonna get lot lot harder. brudda this was LOT LOT HARDER
is this for CAIE ? or AQA or something else
Can't thank you enough 🙏🏻
Thank you so much ❤
Thank you for the video, it is great!
Great video keep it up!
good stuff brother.
great video thank you so much
U r the best
Lovely. That's an excellent one. Try to prepare some more advanced NMR videos.
whyre there soo low views!
thank you daddy
What are you saying?!?!
Crazy 💀
8:06 YOU NEED TO SORT THIS OUT. IN MY 23 YEARS OF LIVING AS A CHEMIST I HAVE NEVER, EVER, IN MY LIFE SEEN A CARBON "DOUBLE BONDED😱😱😨😰" TO A HYDROGEN 🤯🤯🤯🤯🤯🤯🤯 THIS MATTER IS NOT OVER SCIENCE SHORTS UNTIL ONE OF US DIES AND I HAVE NEVER DIED BEROFRE. EMBRARESING
Sorry, where do I say that?
@@ScienceShorts Its written down
@@tomwormell3705 it’s not hydrogen double bonded, it’s C but he’s written H2 next to it because those two H are bonded to the first carbon
@Tom Wormell after spending 23 years as a chemist what are you doing watching an A levels chemistry video?
@@sabeenshahid2024 Clearly, he is looking out for future chemists studying from this channel.