H-NMR Spectroscopy Basics [Livestream Recording] Organic Chemistry Review & Practice Session

[@Leah4sci]

H-NMR Practice Worksheet + Live Session Notes at Leah4sci.com/orgolive (along with a heads up for additional upcoming exam review sessions) on my website: Leah4sci.com/orgolive

[@Nafeej-no2un]

Mam can you make videos on aldehyde ketone carboxylic acid and amines names reaction and their mechanism to learn.

[@Leah4sci]

I have many videos already on many of these topics. See Leah4sci.com/syllabus

[@alizarin124]

Omg thank you so much! We just started the new term and this is exactly the lesson we are tackling on!! Thank you for making it so much easier to understand!

[@Leah4sci]

Glad this helped. I personally find spectroscopy to be THE MOST DIFFICULT organic chemistry topic

[@aaliyahabdalla]

@@Leah4sci This IS SO DIFFICULT FOR ME ;( !! PLease do a live video again !

[@thebeatles9]

please continue to do orgo 2 topics!!!! IR, NMR, UV, then into advanced benzenes, phenols, and ethers

[@Leah4sci]

I will put a poll in a few days for the next live stream. Make sure to vote

[@thebeatles9]

Yes! We are also learning Mass, IR, and UV spec

[@Leah4sci]

Hope this helped, I hope to cover those topics at some point as well

[@chidohkootlole7136]

What a fantastic clear tutorial! Thank you so much.

[@Leah4sci]

You're very welcome! I hope you feel much better and less scared with H-NMR after watching it

[@hungrystudentin]

leah thank you so much! Unfortunately i couldnt take a part on a live stream, cause here it was 2:15 haha, but now i watched your video and i am so grateful! I would be really happy to see more Instru videos from you:3

[@Leah4sci]

That's why I posted it to KZbin, I knew that not everyone could attend but I still wanted you to be able to learn. Hope you found this helpful

[@katherinesills3852]

Thank you thank you for explaining this concept in a very common way. 😊😊😊😊

[@Leah4sci]

You are very welcome!

[@MyChemicalRS]

Thanks to you I finally understand this somewhat! =D your explanation is great!

[@Leah4sci]

Somewhat is a good start, what's it going to take for you to fully understand?

[@MyChemicalRS]

@Leah4sci maybe some more time XD I only started learning this like two weeks ago. I'm a laboratory student and my teacher asked if I could find out how NMR works for her, I only knew the basics of organic chemistry but thanks to your explanation I understand now how the grouping of neighbors works and how to read the spectrum, I feel I should put some more time in for more expert level organic chemistry to understand fully, as in school I haven't learned about pi bonds and hybridization. I did three analysis on HNMR as a start the first one butaan-1-ol and that spectrum I could predict right buy with larger molecules I still have some trouble I feel mostly because I still have to learn a lot 😀 thankyou for your interest!

[@Leah4sci]

Oh wow, this workshop was meant for organic chemistry students who've hopefully learned the basics required to follow along. I'm impressed that you were able to

[@MyChemicalRS]

@@Leah4sci Thankyou very much! =D I will keep watching your vids to learn more!

[@theswave7975]

Thank you so much you helped me get an A plus in arene chemistry

[@Leah4sci]

Awesome, so glad I could help!

[@Lara-zy1xb]

You are a life saver!!!!

[@Leah4sci]

Happy to help!

[@johnstillman2935]

thank you Miss Leah F

[@Leah4sci]

You're very welcome

[@kaylabeasley]

Can you do a live for reactions of alcohol and phenols and ethers and epoxides

[@Leah4sci]

I typically determine the livestream topic a few days prior after posting a poll to the KZbin community tab. Make sure to vote every time I post there

[@manirhede]

Correct me if I'm wrong but for Hydrogen types on the ring at 26:54, the hydrogens of the ring should not be classified as the same type because there is no free bond rotation of these hydrogens because they're on a ring. Hydrogens on a dash/wedge are in a different environment as they are trans/cis to that methyl group? That's what I understood from my professor but is this correct?

[@Leah4sci]

Yes, that's correct. Now for this particular structure of methycyclohexane, we would end up with a very crowded-looking NMR spectrum where a lot of those signals are overlapping, only because its alkyl nature won't produce much of a chemical shift. All signals would be present between 0-2 ppm, and therefore it would be easy to mistake multiple signals for a single one. Great question though!

[@leticiacruz71]

when you add the “don’t forget to subscribe” button, you covered the bottom portion of the screen which made it impossible to see what you wrote there. I suggest adding the button but only for a brief moment or smaller up in the corner somewhere.

[@Leah4sci]

Oh wow thanks for pointing it out

[@muhammadakram5716]

Appreciated..

[@Leah4sci]

Thank you

[@Nicky_Mba]

Thank you for doing this

[@Leah4sci]

You're so very welcome!

[@G_ON18]

Thank you, it is amazing 🤩

[@Leah4sci]

You're welcome, I'm so glad you like it!

[@kazeemsuleiman8721]

yes i would like to see it on the graph

[@Leah4sci]

in response to which question? (what time in the video?)

[@ItsMe-dj6pl]

Trikes are amazing

[@Leah4sci]

:)

[@aaliyahabdalla]

H NMR, why is there sometimes a table with chemical shifts and relative areas? Does this information help with determining how to draw the structure when the peaks are not clearly visible?

[@Leah4sci]

Do you mean a little table within the big graph? Yes, sometimes you're given a zoomed in graph for an area that is otherwise too ambiguous to see on the regular graph

[@Leetscode_here]

hey Leah thanks for this amazing video , my question is how would you tackle those compounds with halogens or nitrogen attached to it?

[@Leah4sci]

Hopefully you'll be given more information such as a molecular formula, or MS or IR (or a mix). Then you simply look at how these groups would behave in H-NMR and validate your assumptions with the other complimentary graphs

[@NajmaAden-o4j]

24:21 How is each hydrogen in the methyl unique? Also since there is symmetry and the adjacent hydrogens connected to the ring are the same (same color), why is it counted as its own (4 neighbors from the ring)?

[@Leah4sci]

There are 3 identify hydrogens on methyl. They are not unique. The ratio is 1:4 so even though it appears to be just 2 sets of 2 identical H atoms, the tertiary H is still getting split by the effect of having a total of 4 neighboring H atoms

[@kazeemsuleiman8721]

my question here is that , what does the singlet peak stands for?

[@Leah4sci]

A singlet would be seen if you have a group of Hydrogens with no neighboring Hydrogen groups. Therefore, we don't see any splitting from that signal because no other Hydrogens are nearby. Make sure to watch my mini-series to learn more: Leah4sci.com/NMR

[@hellenladino848]

could my molecule be counted as wrong if a do CH3CH2COCH3, its the mirror image but im not sure. (minute 56) thank you.

[@Leah4sci]

Good question. You would still be correct! We are trying to piece together the connectivity of the atoms in the molecular formula, and your structure gives us the exact same bonds and connectivity.

[@Schoolerino-pj8pu]

if any contemporary professor is making students MEMORIZE band patterns and not giving a handout for the exam then ... i don't even. That's like not giving someone a periodic table in gen chem.

[@Leah4sci]

I was required to memorize them without being given a table on the exam. It's actually quite doable with enough review and practice. Study the trends and relationships more than the actual numbers so that you can easily solve a graph without a table

[@jadahurst2688]

C-NMR please! Thanks!

[@Leah4sci]

Thanks for the suggestion