Chemical Shift In NMR Spectroscopy

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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.
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15 июл 2024

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Комментарии : 136

@TheOrganicChemistryTutor 5 месяцев назад

Organic Chemistry PDF Worksheets: www.video-tutor.net/orgo-chem.html Full-Length Exams and Worksheets: www.patreon.com/MathScienceTutor/collections

@fahimasultana6851 Месяц назад

I thought it was free 😅

@notthecontinent 5 лет назад

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.

@joehunt7240 5 лет назад

True, the guy is a boss though, so should be forgiven :)

@rainbowdust919 5 лет назад

I was thinking the same thing. When he goes to compare them right after that, he says it the other way around.

@Exceltech810 5 лет назад

yep.

@samara1344 5 лет назад

thank you! I was so confused by his mistake. Surprised there aren't more comments about it

@karlschmelzer6325 5 лет назад

@@joehunt7240 hello from AXE tau chapter C=C

@mohammadaamirkardar4358 4 года назад

Incredibly helpful, as usual. Yours is the most reliable channel in RU-vid for learning Chemistry in my opinion. Thank you so much.

@saschakoene2363 2 года назад

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!!!!

@Olivia-W Год назад

Yes, I learned more in the first minute than in a 1.5 h lecture...

@rodiatmorin6402 2 года назад

This tutorial is still great after several years Thanks a lot

@Coca-Cornla Год назад

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!

@pugsley_makene 3 года назад

you really make understanding organic chemistry easy!

@razabazal4669 4 года назад

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

@nqobilenqobile6114 4 года назад

same here

@julietonyekaonwu3107 10 месяцев назад

Stick to your channel for years now, thank you JD.

@PhilTheThrill 5 лет назад

Do you have any videos on quadratic word problems or modeling? I am in a college algebra math class.

@ohmbhatt257 5 месяцев назад

5 years late but yeah he does, I’m assuming you ain’t in school anymore tho💀

@octaviocampos1316 4 месяца назад

@@ohmbhatt257 🤣

@octaviocampos1316 4 месяца назад

Where you at bro

@lamaalghool8561 4 года назад

please review the video. Chlorine is more electronegative than bromine, and not as you said. Thank you.

@muhabrehman8645 5 лет назад

@ 2:00 shouldn't methyl chloride have the higher chemical shift?

@enochkandiah6445 4 года назад

Indeed.

@9001012 5 лет назад

Wish I was as advanced to nderstand ... I will get there .. Love your videos

@anwaralshammari8413 3 года назад

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

@adeebaibnat1030 3 года назад

He deserves everything ❤️❤️❤️❤️❤️❤️

@rogersrivasan2150 Год назад

Truly magnificent! You are awesome!!!

@jaiminraulji8491 Год назад

thank you. video was really helpful to me understanding of 1h nmr amazing 🤩

@lizahasan1116 Год назад

Hope you the best your videos are amazing ❤😊

@munirabbe3932 4 года назад

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?

@jesusmrosario-claudio4104 3 года назад

Thank you once again.

@ManiaWalmart 3 месяца назад

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

@kavyarajanna87 5 лет назад

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

@trevorndhlovu7834 4 года назад

Great video thanks.

@aliu760 11 месяцев назад

around 2:20 . Cl is more EN than Br . just stating for the confused audience. I 100% recommend him though

@tarekabdel-nabi9383 4 года назад

chemical shiff

@muhammadazharzeta2416 4 года назад

Wish me luck on my pop quiz later :) Thx for the video it helps me thousand times better than my class

@bineshe Год назад

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 ?

@nagavenipathak3219 3 года назад

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

@kusumshibaranjanibohidar5996 4 года назад

Chlorine is more electronegative than bromine right?? F>Cl> Br> I

@walkastray007 5 лет назад

533k subscribers! I remember when you had 10k, congrats man! Keep up the good work :)

@lamotsoo6955 5 лет назад

771k now

@razabazal4669 4 года назад

@@lamotsoo6955 1.5 million now

@southpoleelvs 3 года назад

Over two million now

@walkastray007 3 года назад

@@southpoleelvs don't even remember making this comment but wow time sure did fly.

@daughteroftheking3220 2 года назад

@@walkastray007 4.24 million now, he is the top RU-vid educator on here. No one can reach his level, what a genius!!

@visualjouneywithmanoj Год назад

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.

@eyoshaphetyohannes294 2 года назад

in first example CI is more electronegative than Br so more deshelled is methyl with Ci i think

@bhupinderbedi8242 5 лет назад

Which application do you use for writing?

@alexwinternitz1200 4 месяца назад

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.

@cotyb5028 10 месяцев назад

Does anyone else just feel like it's Mark Wahlberg teaching you chemistry when you watch these videos? I love it.

@atiyahussain3837 3 года назад

Thank you so much!

@mattgibson3633 4 года назад

Chemical Shif

@mehranshah5146 4 года назад

The shift on methyl chloride is higher than the other coz chlorine is more potent electron withdrawing group

@xinyanghermanleong9934 3 года назад

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.

@alexngasa5319 2 года назад

Sure I support you

@mominuddin6244 Год назад

nice vedio

@chell6022 Год назад

what a based man, thank you!

@deatheth5039 3 года назад

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)

@erindaandriana7090 8 месяцев назад

That laugh on 10:10 ...

@edwardmureka3870 Год назад

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.

@johnboutros8727 3 года назад

Fall 2020 final check in

@paultwomey3082 5 лет назад

Make a Manufacturing playlist

@user-to3tr4tk1f Год назад

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 🤍

@jessapi6328 2 года назад

May you always have great karma for these videos!!! You helped me so much 😭

@raspberry5747 2 года назад

2:07 bromine is less electro negative than chlorine right?

@praisewealthonete7110 5 месяцев назад

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.

@nishantsaikia5985 4 года назад

Can someone explain how a proton undergoes alpha spin and beta spin at its first state?

@redbean9410 Год назад

basically you blow on it really hard and it just spins and spins and spins

@Kiindoziil 5 лет назад

What program are you using for drawing please any one help me

@TheOrganicChemistryTutor 5 лет назад

Here it is: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rBSuMooMYrs.html

@sayaliborade6351 3 года назад

Why people here are talking about little mistake he did about chlorine and bromine? Please appreciate his work dont pick negligible mistake.

@jonathanlalrintluanga4737 3 года назад

2:08 bromine is more electronegative than chlorine.. You sure?

@Gencgello 5 лет назад

Hello, do you have any videos about chemical processes? I have trouble learning this and cant find it online. I wish you have it..

@josephgunturu7777 3 года назад

Bro... Electronegativity of Cl is more than Br... please check bro... I'm confused little bit... but confirmed that...

@quanbui7663 Год назад

Can anyone explain why etilen has higher chemical shift than axetilen? Although Csp has higher electronegative than Csp2.

@DrTuph 9 месяцев назад

2:07 Cl is more electronegative than Br.

@siki7115 5 месяцев назад

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