Shielding and Deshielding - H NMR Spectroscopy

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Shielding and Deshielding - H NMR Spectroscopy

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Күн бұрын

This organic chemistry video tutorial discusses shielding and deshielding as it relates to H-NMR spectroscopy. A hydrogen nucleus is said to be shielded from an external magnetic field if it is an electron rich environment. It will thus appear upfield in the NMR spectrum. Protons adjacent to electron withdrawing group are said to be deshielded and appear downfield in a NMR spectrum.
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Пікірлер: 65

@TheOrganicChemistryTutor 7 ай бұрын

Final Exams and Video Playlists: www.video-tutor.net/

@bloobeff 3 жыл бұрын

"b is in the middle bc its just in the middle" , that is my explanation too i felt that

@couragemensah4291 3 жыл бұрын

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@vangaverejentel 4 жыл бұрын

Your tutorials have been such a great help and it's much appreciated because my professor failed to make a decent book

@drball2558 5 жыл бұрын

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@Saif-jp8ue 4 жыл бұрын

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@aryanimagine 3 ай бұрын

A lil maybe me too

@brightonhamusonde5080 Жыл бұрын

This is deeply, wonderfully and passionately explained. Thanks so much brother man

@leilaborromeo 5 жыл бұрын

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@aryanimagine 3 ай бұрын

Where are you now?

@joelsunny 4 жыл бұрын

Life saver

@aiyshasulaiman5755 3 жыл бұрын

Super super super helpful. Thank you!!

@lingeaswaranss6753 2 жыл бұрын

you r the best in explanation

@ganeshgs2241 5 жыл бұрын

more the electron density around the nucleus, we need more energy to penetrate the electron shield and to feel the nucleus which means more frequency. ie.. we need higher frequency to dance the shielded protons.... this video is complete contrary.. Please verify sir...

@thio2620 5 жыл бұрын

Thats why i was wondering that why my text book and this video is not telling me the same.there is something else in my book 😧.I watched this two times .maybe there is some other point we are missing.

@karenarmstrong2796 2 жыл бұрын

I understood it as the more electron density around the nucleus the lower the effective field felt by the nucleus the lower the frequency needed to flip the spin (get a signal).

@faisalarafat4985 5 жыл бұрын

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@aryanimagine 3 ай бұрын

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@ahhkg 6 ай бұрын

Amazing teaching

@janpavlik3170 4 жыл бұрын

You are an amazing tutor, thank you! :D

@AK2I47 5 жыл бұрын

great tut

@johnguillen68 5 жыл бұрын

Thank you for this explanation. I got a better understanding

@MaryBukowski 10 ай бұрын

thank you o-chem tutor!

@chessmaster6407 Жыл бұрын

excellent explanation

@neil7272 5 жыл бұрын

Calculus 2 Final Review please!

@haneefamusa4155 9 ай бұрын

THANK YOU SO MUCH

@novelsolomon2871 5 жыл бұрын

H NMR signaling please,, thank you so much!!

@aryanimagine 3 ай бұрын

Avatar!

@alisharo58 4 жыл бұрын

I just don't understand why if the neutron/atom is SHIELDED, why a LOWER FREQUENCY is needed. I guess I'm thinking of frequency in terms of energy. If there's a shield preventing the atom from feeling the magnetic field, wouldn't more energy (proportional to frequency) be needed (to create a prominent effect, B_eff, on the neutron)?

@ramdog2536 4 жыл бұрын

The magnetic field isn’t the energy source in NMR, but it determines the energy difference between the two nuclear states (pointing ‘with’ and ‘against’ the magnetic field). You need to fill in this energy difference with the right amount of radio wave energy (the amount of energy rises with the wave’s frequency) to achieve nuclear magnetic resonance. The stronger the magnetic field, the higher this energy difference (with no magnetic field, there is no energy difference because the nucleus is free to ‘point’ wherever it wants). The NMR machine applies only one magnetic field of constant strength, but it uses a whole spectrum of radio wave frequencies to see which frequencies are just right to put the nuclei into magnetic resonance. Watch the video again with these things in mind.

@drball2558 5 жыл бұрын

It has other teacher and you know it. But overall you are in the top ten

@aryanimagine 3 ай бұрын

Dr ball, are you a dr

@ritikashrestha9994 9 ай бұрын

Thanks for sharing this 🙏

@babitachaudary3683 4 жыл бұрын

I need your other videos related to this topic

@jesusmrosario-claudio4104 3 жыл бұрын

Thank you once again.

@muskanborana1158 3 жыл бұрын

It was very useful thank you sir!!!

@marvellnelson9141 4 жыл бұрын

Thanks keep up the good work.

@ayshafariatwinkle8717 2 жыл бұрын

Excellent

@alkhan5445 3 жыл бұрын

Great vid.

@shifaqureshi4385 2 жыл бұрын

Presence of Hydrogen bond around proton increase sheilding?

@imranh9055 5 жыл бұрын

Thats a great lecture......

@koko-oz7jf 4 жыл бұрын

Actual god like person

@taiwomoboluwarin1388 2 жыл бұрын

Thank you

@user-xc8mg8oh1o Жыл бұрын

Shieldin’ and deshieldin’

@moonlight-lc7zc 4 жыл бұрын

Super duper ! Thank you so much

@PaKiKiNg908 5 жыл бұрын

Thank you so much Sir

@mahxylim7983 2 жыл бұрын

Thanks a lot !

@ClarissaRose 3 жыл бұрын

Thank you so much!!!!

@avocadosnumber498 2 жыл бұрын

You might be wondering "what does that even mean?" I've been wondering that every day since orgo started lololol

@punnyamohan851 5 жыл бұрын

Thank you sir

@missmegan9208 2 жыл бұрын

is this kind of stuff college level in the US? I'm from the UK and in university learning this. just curious

@alexfrostbound4401 2 жыл бұрын

Yup! Learning this in organic chem right now

@dododody9062 5 жыл бұрын

wonderful

@erenyeager9791 2 жыл бұрын

Marvelous!!

@directionerforever1238 Жыл бұрын

THANK U OMG

@SjsjjSjsjjs-wy2js Жыл бұрын

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@sidharthparashar 5 жыл бұрын

Nice

@autobot021 5 жыл бұрын

Im here but I have no idea on this subject .. just here out of curiosity

@salahpacino8417 2 жыл бұрын

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@rebeccatan4288 4 жыл бұрын

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@user-yy6po9tw3b Жыл бұрын

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@christinarose2877 3 жыл бұрын

Yes, I am wondering "what does that even mean?!?!?!"

@amacgregor92 3 жыл бұрын

I love you

@jian658 5 жыл бұрын

not a good explanation! why shielding why deshielding, you tell us this results, but no explain why we get this reason