In this video I determine a plausible chemical structure for an organic compound based on the given IR and H NMR spectra. For a copy of the tables I used, click here: drive.google.c...
Пікірлер: 127
@TheReck123 жыл бұрын
Nmr is the bane of my existence, I'm never going to become a chemist
@phatcat-st4gb Жыл бұрын
I agree. NMR for me is like riding a bike without the seat, if you know what I mean.
@kianna27011 ай бұрын
I hate ittt so much, IR spec is so much easier and when I got to NMR I was like pls… god no…
@arias8ale8 ай бұрын
Honestly it’s so easy once you do the “I am ___H next to ___H’s it gets to easy
@kaytlynsharp96407 жыл бұрын
You have saved my life.. This is so much easier to understand than my professor.
@TonyStJohn7 жыл бұрын
Thanks for the comment Kaytlyn! I'm glad to hear you found this video helpful. If there are any other topics you'd like me to make videos about feel free to email me at tony.chemistryexplained@gmail.com
@priscacaesa65364 жыл бұрын
I'm agree with you hahaha my professor so....................... Jshahakbsenhaksshwkjs
@kiino213 Жыл бұрын
Man be saving lives even after 7 years
@durmonov5 жыл бұрын
thank you for this video, I have an exam on how to find the structure of molecule using both nmr and IR, mass spectre, this video was what I searched
@mrinabhk59172 жыл бұрын
SIR, we need more videos with other examples... practicing more these problem with you makes it more easier.
@roninissim37118 ай бұрын
reallllllll
@NatalieNeff967 жыл бұрын
I love how you broke everything down! Made it so much easier to understand, thank you so much!!
@TonyStJohn7 жыл бұрын
You are very welcome!
@5mb-5minutesbiochemistry672 жыл бұрын
I watch your videos at 2021 and found this very useful. keep doing good !
@shifaasaif26932 жыл бұрын
exactly!! better than how my lecturer explained to me!
@isacjoseph28753 жыл бұрын
Just take my money. This is worth the time in gold.
@samuelnyandwi33495 жыл бұрын
Wooow these explanations are so good, like I am so happy I found this video! Thank you so much!!
@_Babita-4 ай бұрын
Tysm for explaining in a very easy and basic manner. It ready helped me a lot.❤
@roninissim37118 ай бұрын
I love you this is the best EVER!!!!!!! very helpful I wish you the best in life Tony I can't thank you enough.
@joshjulian67935 жыл бұрын
This was very helpful! I'm looking forward to more videos :)
@shifaasaif26932 жыл бұрын
Thank you so much😭❤️❤️ i have a final exam tomorrow and i was really worried, i get it know. Anddd i like your pen
@jacktam58553 жыл бұрын
You saved my life. Thank you very much.
@laylabitar58534 жыл бұрын
Wow you walk through this with great explanation. Do you have more videos with these types of problems ?
@stinkydogguy126 жыл бұрын
Oh wow this video has lots of views! You were a great professor at WWU. Keep it up!
@rickyscollegescene34845 жыл бұрын
view digger be gone
@muazmustafa16557 жыл бұрын
This is just what I needed to review for my final tomorrow. Thank you for the helpful video
@TonyStJohn7 жыл бұрын
You are very welcome! Good luck on your final!
@mpsenicka87925 жыл бұрын
No because there are no H's on the adjacent carbon. The H's on the ring are on non-adjacent carbons and therefore are too far away to cause splitting.
@user-hy3yu4wx1j5 ай бұрын
In this video I determine a plausible chemical structure for an organic compound based on the given IR and H NMR spectra.
@radhamanoharrs7 жыл бұрын
Very much helpful to learners like me thank you for such a great video
@TonyStJohn7 жыл бұрын
You are very welcome! Thank you for the nice comment!
@AnaPaula-yb3ui3 ай бұрын
Love u Tony, thanks so much
@joshg.6536 Жыл бұрын
Great content! was very helpful.
@hkharis073 жыл бұрын
Keep it up, Dr John. Well explained.
@HD151534 жыл бұрын
Thank you for the great video. I learned many things from you.
@jurevirtic38047 күн бұрын
wouldnt it be more plausible if the ehtyl and methyl groups were swapped, since the CH3 would feel other H in the ring and would have some noise if not even a triplet?
@LoveAustralian6 жыл бұрын
My professor gives us the NMR data, but asks us to figure out IR ourselves first, it isn’t given. Also we have to memorize all of the NMR and IR numbers, we don’t have a chart given to us to use on the exam. I have yet to find a video that explains how to come up with an plausible organic structure using only given NMR data to come up with IR data.
@TonyStJohn6 жыл бұрын
Morgan Gill that will definitely make it more challenging! But, depending on the compound there is a lot of good info you can get from just the NMR. If you want to send me an example problem I can take a look today and make a new video for you! You can email me at Tony.chemistryexplained@gmail.com
@YataLock986 жыл бұрын
Same here ,I have to memorize all the HNMR, CNMR ,IR , Mass Fragmentation values , do they see us as machines ?
@LoveAustralian6 жыл бұрын
Thank you for replying! I never saw it! I finally got it after I looked at it a bit more, and now it’s easy! I ended up with an A in the class, PTL. Thanks for uploading this video!
@foxyalchemist82715 жыл бұрын
@@LoveAustralian Would you be able to give a few pointers on how to solve these problems? If not, could you direct me to a KZbin that can? I am currently in the same boat as you were. Thank you
@LoveAustralian5 жыл бұрын
Afiya Fox I’d have to see an example problem, it’s been 8 months since I last did NMR and IR! However, I’m sure this professor would be willing to help if you emailed him! He said his email is Tony.chemistryexplained@gmail.com Best of luck! (As for recommended KZbin videos, I actually pulled up charts on google of NMR to IR, if I remember correctly, and practice problems on Chegg of IR to NMR and that helped too!)
@alirezaghazavi4 жыл бұрын
you made me pass my exam god bless
@ripcactusify2 жыл бұрын
Why is it sp3? Sp2? I'm not understanding this part. You just kinda stated it.
@bottomtext2514 жыл бұрын
What if you do not have labelling for your NMR-spectra?
@debradias82886 жыл бұрын
In examination, they don't give us the chart.I'm so terribly confused😨
@iranovianti68397 жыл бұрын
This is just what I need.. thank you so much..
@TonyStJohn7 жыл бұрын
You are very welcome! I'm glad it was useful.
@michellla933 жыл бұрын
Do you have a pdf of the sheet you were using with those values?
@creativefruittree34807 жыл бұрын
may God bless your soul you helped me so much
@TonyStJohn7 жыл бұрын
You are welcome!
@olawaleadeniji14127 жыл бұрын
You're a superman... Thanks alot
@TonyStJohn7 жыл бұрын
Ha! I don't know about superman, but you are very welcome!!
@leonardodicaterina76757 жыл бұрын
Really clear and quick, but I think you could manage finding out the products that comes out with the tautomerization process, to be sure that is effectively a carbonyl group, and also to avoid any possible viewer doubt about the other signals. that's my opinion
@rawanwaleed6788 Жыл бұрын
So helpful thanks a lot!!
@maryamahmad8057 жыл бұрын
U ARE AMAZING :) thanks a lot
@TonyStJohn7 жыл бұрын
You are very welcome! Good luck with your studying!
@nebojsasimic62486 жыл бұрын
Hi Tony, I have to admit, a very nice explanation. However, I wonder how you know that the propyl group and methyl group at 2.3 ppm are not swapped? The shift difference between CH3-C=O and CH3-Ph is very small (2.1 and 2.3 ppm respectively, according to your shift table) and, in my experience, the shift alone cannot be decisive in such cases. Is your structure based on some additional spectra, e.g. HMBC?
@TonyStJohn6 жыл бұрын
Hi Nebojsa Simic! I think the easiest way to answer your question is to look at the integration and splitting patterns of those peaks you are questioning. The peak that I have assigned as the aromatic methyl group integrates to 3H and is a singlet, while the peak that I have assigned to the CH2 group next to the carbonyl carbon integrates to 2H and is a triplet (splitting from the adjacent CH2). Does that answer your question? Hopefully it helps!
@pi27459 ай бұрын
Me too i feel the same .. since ch3 can give s at 1 if only propyl was para to ester
@ahbak476 ай бұрын
Can't we switch the R groupe? Ch3 with co and o . And ch2ch2ch3 in the para side?
@missy86597 ай бұрын
hi, love the video. i'm confused by one small item though, why is the methyl group attached to the benzene a singlet? is it not affected by the neighbouring protons on benzene?
@mariaemiliagomespereira34557 ай бұрын
It’s not affected because the other hydrogens are not 3 bond neighbors to the ones in the methyl
@a.n.56096 жыл бұрын
Would degrees of unsaturation be necessary in validating the structure? If so, why am I getting a large number when calculating the d.o.u. ?
@zee0295 жыл бұрын
Akwi Njoh I believe you’d get 5 - this accounts for 1 ring, 3 pi bonds in the ring, and 1 double bond in the carbonyl group
@shobhitshrivastava10052 жыл бұрын
If 2 imine group is present and both attached with benzene ring. What would be expected peak. In IR
@HimanshuSharma-xn6uc3 жыл бұрын
They don't give us table any way to memorize it
@atulksharma206 жыл бұрын
its sooo Easy thanks
@rociolopezdomene95676 жыл бұрын
You are great!! thanks :D
@ajamanadair26928 жыл бұрын
I have several IR spectrum gotten from my research which I have grafted polyacrylamide onto Hydroxyethyl cellulose how to completely assign the spectrum
@dopaminegirl867511 ай бұрын
Thank you ❤️
@EliwoodX8 Жыл бұрын
Gracias! Mis profes no tienen idea como explicar
@quantum74016 жыл бұрын
I have some 14-day old urine in the refrigerator, I want to drug screen it via GC/MS. Will the results still be valid? What is Forensic protocol, in regards to length of time a sample is valid?
@kikakarbasi90592 жыл бұрын
tnx a lot for your useful video..how can I access to your handout?
@Kerwyn2047 жыл бұрын
can you pls put the copy of the problem again, the link doesnt work. thank you
@ahabfarhan35477 жыл бұрын
thanks u soo much ... u save my life
@TonyStJohn7 жыл бұрын
Haha, you are welcome Ahab! Glad you found it helpful.
@muafiamushtaq70803 жыл бұрын
Assalamualaikum Tony. I want to get solution of alkyl halide Spectra's by NMR.. I have to present it by next week. Can you please help me..
@sonawanechanda9961 Жыл бұрын
Plz explain uv spectroscopy Structures of dien & enone plz
@mariaiqbal55197 жыл бұрын
I have no idea about nmr (H1, C13), no base, this subject is new to me. But I have a spectra of my compounds, how can I solve it?
@TonyStJohn7 жыл бұрын
Hi Maria, if you are able to email me your spectra I would be happy to make some easy explanations of the theory of NMR! Just email me at tony.chemistryexplained@gmail.com
@mariaiqbal55197 жыл бұрын
okay
@hysteria697 Жыл бұрын
We are doing this type of stuff in Ochem 1 and we don't get a table!!
@latestlive59254 жыл бұрын
I dont know sir.......how explain ???????
@faraha22857 жыл бұрын
Hello Tony. Usually at our exams what we get, is the molecule and we have to give the chemical shift, Multiplicity (s,d,t,q) and the integration (1H, 2H, 3H etc). I have been looking through youtube without finding an example that shows how to solve such problem. Also we get the nmr spectra by itself without an IR. Can you please help?
@TonyStJohn7 жыл бұрын
Hi Farah, of course! Do you have a specific molecule example that you'd like me to make a video of? I will try to find something to post tomorrow in any case! Here is another video that I recently made that just deals with an NMR spectrum that might help as well: kzbin.info/www/bejne/kJSxepSonrKeicU
@faraha22857 жыл бұрын
Oh You answered. Thank you so much. Well, I have 2-3 examples actually from previous exams with the answers as well - that doesn't help me that much, as I want to understand it and solve it myself. Do you have an e-mail I can send you these examples? Thank you again for replying ...
@TonyStJohn7 жыл бұрын
Hi Farah, you can email me at tony.chemistryexplained@gmail.com
@kavyapatel45647 жыл бұрын
The -CH3 attached to benzene ring should have (2H,d) and not singlet is'nt it?
@TonyStJohn7 жыл бұрын
Nope! The label (2H, d) would mean the integration is 2, and the splitting pattern is a doublet. Since the -CH3 attached to the benzene ring has 3 H's, it should integrate to 3 (3H), and since there are no H's on the carbon in the ring that the -CH3 group is attached to there will be no splitting and will therefore be a singlet (3H, s). Hope that makes sense!
@kavyapatel45647 жыл бұрын
thank you sir, I understood my mistake. There are 3H's typing mistake and doublet i took the adjacent carbon splitting. Thank you sir for your reply and explanation.
@rakeshsahu18935 жыл бұрын
acc. to final structure there must be a quartet (ch3-ch2-)
@Kaiserland1114 жыл бұрын
The chain in question is actually H3C-CH2-CH2- so the middle carbon's hydrogens are split by both the 3 hydrogens to their left and the two to their right. Thus it would be a multiplet, not a quartet.
@learnwithhafizaarsala55194 жыл бұрын
informative
@asdfg-wu1tu6 ай бұрын
1759 is HC=N
@Orgophile4 жыл бұрын
cool!!
@katiagaspar76767 жыл бұрын
Helpful
@aneesabdullah34187 жыл бұрын
can I contact you Tony St. John, I have some problem in explanation of my FTIR chart
@TonyStJohn7 жыл бұрын
Hi Anees! Feel free to email me at Tony.ChemistryExplained@gmail.com
@aslit53143 жыл бұрын
I liked that pen
@tugceklnc76404 жыл бұрын
Soru göndersem cevaplar mısınız
@KenyaTeam20117 жыл бұрын
How do you know there is a ring and not a double bond?
@TonyStJohn7 жыл бұрын
Hi Allison, the peak at 1600 in the IR spectrum tells us there is a ring!
@KenyaTeam20117 жыл бұрын
Thank you!
@TheKhanViction7 жыл бұрын
Also, if you do the HDI you can kind of guess if it is a ring if it is greater than 4.
@taohidahmed314310 ай бұрын
It is very very hard
@alchemical19888 жыл бұрын
good please sent me the problem of this?
@zahraachemists81667 жыл бұрын
محمد الكيمياوي عربي مفتهم الماده خويه
@Mipso965 жыл бұрын
I'm so fcked for tomorrow lol, I hate how we have to memorize all the fragments, CNMR, HNMR spectra values like can't we have a chart or something? :'(
@navs80988 жыл бұрын
hi, where could i get a copy of that table?
@TonyStJohn8 жыл бұрын
+Nav Seira Here is a link to the tables! drive.google.com/open?id=0BwOceMKQTVFxRTh1Szl4aTh0eE0
@navs80988 жыл бұрын
***** thanks!
@esmeraldadenisse21794 жыл бұрын
If only we could use a cheat sheet
@mrkillua50375 жыл бұрын
Could you do one just from analytical data, no graphs ?
@colorpharma21234 жыл бұрын
Yes
@claudiasiete4 жыл бұрын
♥
@Mentosman3216 жыл бұрын
Praise Be Tony St. John, Savior of the Orgo Students!
@lakshmiprasanna82945 жыл бұрын
Sir I am a research scholar, I have lot of confusion in nmr interpretation and IR interpretation ,can you help me
@ghaziazouni87666 жыл бұрын
why/
@shubhammore49863 жыл бұрын
Sir C9H11BR
@callmehoo7 жыл бұрын
Sir, is it possible for you to email me the reference table that you use in the video? Please. I really need it
@TonyStJohn7 жыл бұрын
If you click on "Show More" in the video description I have posted copies of the reference tables!