Chemical Shift In NMR Spectroscopy
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- Опубліковано 28 лип 2024
- This organic chemistry video tutorial provides a basic introduction into chemical shift in NMR spectroscopy. It covers the inductive effect of electron withdrawing groups on the chemical shift of proton signals on a NMR spectrum.
Alcohol Reactions - HBr, PBr3, & SOCl2:
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I thought it was free 😅
I think you made a mistake in the first example saying Br is more electronegative than Cl. Cl has EN=3.16 and Br EN=2.96, so CH3-Br would be more upfield (shielded) relative to CH3-Cl.
True, the guy is a boss though, so should be forgiven :)
I was thinking the same thing. When he goes to compare them right after that, he says it the other way around.
yep.
thank you! I was so confused by his mistake. Surprised there aren't more comments about it
@@joehunt7240 hello from AXE tau chapter C=C
Incredibly helpful, as usual. Yours is the most reliable channel in UA-cam for learning Chemistry in my opinion. Thank you so much.
My teacher was "explaining" this for an hour and a half and I understood NOTHING. I watched two of your videos (25 min total) and I understand everything. You are the best, thank you!!!!
Yes, I learned more in the first minute than in a 1.5 h lecture...
This tutorial is still great after several years
Thanks a lot
I'm studying 'H NMR' and didn't understand chemical equivalence. I got a lot of help in understanding your video. Thank you very much!
you really make understanding organic chemistry easy!
We just started this when they decided to cancel school on us because of the corona virus and my good lord how thankful am I to have found you now that I dont have my teacher
same here
@ 2:00 shouldn't methyl chloride have the higher chemical shift?
Indeed.
Thanks the video was really helpful. But what I need to know is 'Are the chemical shifts for each compound or functional groups constants or is there a way we can calculate them?
please review the video. Chlorine is more electronegative than bromine, and not as you said. Thank you.
Stick to your channel for years now, thank you JD.
Wish I was as advanced to nderstand ... I will get there .. Love your videos
thank you. video was really helpful to me understanding of 1h nmr amazing 🤩
Truly magnificent! You are awesome!!!
Do you have any videos on quadratic word problems or modeling? I am in a college algebra math class.
5 years late but yeah he does, I’m assuming you ain’t in school anymore tho💀
@@ohmbhatt257 🤣
Where you at bro
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Jest I want to thank you 🙏
I study chemistry in Kuwait university and I study organic chemistry with your videos and I got a B+ 🌹 thank you I wish you the best
Hope you the best your videos are amazing ❤😊
Which application do you use for writing?
This video is very informative and thank you so much for this presentation, but one mistake that I had noticed w.r.t. electronegativity of Br ?
this is really a good video as i am preparing for csir this has helped me out really very well. please do a video on oxidation and reduction
533k subscribers! I remember when you had 10k, congrats man! Keep up the good work :)
771k now
@@lamotsoo6955 1.5 million now
Over two million now
@@southpoleelvs don't even remember making this comment but wow time sure did fly.
@@walkastray007 4.24 million now, he is the top UA-cam educator on here. No one can reach his level, what a genius!!
Thank you once again.
Great video thanks.
Wish me luck on my pop quiz later :) Thx for the video it helps me thousand times better than my class
Chlorine is more electronegative than bromine right?? F>Cl> Br> I
You did a mistake in the comparsion of methly bromide and methylchloride but i see you already changed in the decreasing order of electronegativity you have been saving lives since my my Junior Secondary School days you deserve a big award
I don't understand the explanation during minute ten. Methyl groups are electron donating groups so why does adding more decrease the shielding effect. For example, in a carbocation it is favorable to have more methyl groups connected because they stabilize the positive charge.
You are God 🙏 to me in field of chemistry.
Plz bless us always with such vedios.
This will be a great help.
Love from india
Hi, your video is great! However, I have one question: at 14:08, you said methylbenzene is "more deshielded" than benzene (I thought the opposite is true), and methylbenzene has a greater chemical shift than benzene? I thought you said earlier in the video that sth more deshielded has a greater chemical shift?
Nevertheless, thanks for your dedication on free education.
Sure I support you
I understood that the chemical shift is caused by different electron density next to the measured nuclei but I wonder what the direct consequence is. Does the increased electron density on a 1H mean that it is easier to excite an 1H next to a +M/+I group and a lower frequency is needed to do so in comparison to an 1H next to a -I-Group? So as: "The more energy in the form of electrons surrounds your nuclei the less energy (=lower frequency) you need to excite the nuclei"y?
(Sorry for my English, I honestly doubt that what I tried to say makes sense.. I'm just really confused)
What program are you using for drawing please any one help me
Here it is:
ua-cam.com/video/rBSuMooMYrs/v-deo.html
in first example CI is more electronegative than Br so more deshelled is methyl with Ci i think
2:07 bromine is less electro negative than chlorine right?
Can someone explain how a proton undergoes alpha spin and beta spin at its first state?
basically you blow on it really hard and it just spins and spins and spins
Hello, do you have any videos about chemical processes? I have trouble learning this and cant find it online. I wish you have it..
The shift on methyl chloride is higher than the other coz chlorine is more potent electron withdrawing group
From 11:00 minute you mention that methyls are electron withdrawing groups? Is that so? And if that is the case, when do we properly use the term deshielded? I feel you need to state this fact the opposite way. I could be wrong though.
Can anyone explain why etilen has higher chemical shift than axetilen? Although Csp has higher electronegative than Csp2.
Make a Manufacturing playlist
around 2:20 . Cl is more EN than Br . just stating for the confused audience. I 100% recommend him though
Does anyone else just feel like it's Mark Wahlberg teaching you chemistry when you watch these videos? I love it.
chemical shiff
Why Cl is less electronegative than Br?
Your channel deserves to be the best channel ♥️thank you for being very helpful 🥺i am a master student and really your video keeps helping me from my beginning 🤍
You said bromine is more electronegative than chlorine. In fact, chlorine is more electronegative than bromine. Therefore, CH3-Cl will have a higher chemical shift than CH3-Br. I just wanted to let you know that the order you showed was correct.
May you always have great karma for these videos!!! You helped me so much 😭
Bro... Electronegativity of Cl is more than Br... please check bro... I'm confused little bit... but confirmed that...
nice vedio
Thank you so much!
im so confused at the benzene and methylbenzene example at 14:08 T.T he said that methylbenzene's proton is more deshielded so it should have a higher chem shift but he wrote 2.1-2.3ppm whereas the benzene's proton chem shift is around 6.5-8.5ppm
2:08 bromine is more electronegative than chlorine.. You sure?
what a based man, thank you!
Chemical Shif
Why people here are talking about little mistake he did about chlorine and bromine? Please appreciate his work dont pick negligible mistake.
Thanks 🎊..but methyl Cl is more electronegative than methyl Br
Fall 2020 final check in
Still don't understand the shielding effect stuff
Please where did you guys hear Bromine is more electronegative than Chlorine? Coz I heard Bromine is more electronegative than Silicon and that's why it's downfield away from TMS and TMS is upfield. Listen again please.
That laugh on 10:10 ...
Chlorine is more electronegative than bromine
You made a major mistake by saying bromine is more electronegative than chlorine. However, your videos are helpful
2:07 Cl is more electronegative than Br.
What
JD, there is little contradiction in the beginning of the video.
2:15 slip of tongue. Methyl chloride has higher chemical shift than methyl bromide
"OHHHHHHHHHHHHHH" 🤌🤌🤌
😘
Bromine is more electronegative ? Bruh
chemical shif*t*
thanks though, very helpful
Please improve your English language and talk properly explanation is good but it cannot be understandable
He's fluent. His English is great and understandable.
He is extremely good and understandable
His english is extremely well understandable
i can understand his english well
You are one to talk. English is obviously not your first language by the look of your comment. You are the one that needs to improve.
I was having a wrong perception all this while, I thought 3 electron donating group bonded to the carbon will cause the methine proton to be more shielded.
chemical shiff