Spin Spin Splitting - N+1 Rule - Multiplicity - Proton NMR Spectroscopy

This organic chemistry video tutorial provides a basic introduction into spin spin splitting / coupling as it relates to proton NMR spectroscopy. It explains how to use the N+1 rule to determine the multiplicity of a H NMR signal. It also discusses the intensity ratio of singlets, doublets, triplets, quartets, quintets, sextets, and septets using pascal's triangle. It also provides an intro into complex splitting by using a triplet of quartets and a quartet of triplets signal as an example which can be simply referred to as a multiplet.
Alcohol Reactions - HBr, PBr3, & SOCl2:
• Alcohol Reactions - HB...
Free Radical Reactions:
• Free Radical Reactions
Reactions Summary:
• Organic Chemistry Reac...
Organic Chemistry 1 Final Exam Review:
• Organic Chemistry 1 Fi...
IR Spectroscopy:
• IR Spectroscopy - Basi...
Mass Spectrometry:
• Mass Spectrometry
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Proton NMR Spectroscopy:
• Proton NMR Spectroscop...
Carbon-13 NMR Spectroscopy:
• Carbon-13 NMR Spectros...
Ethers and Epoxides:
• Ether and Epoxide Reac...
Diels Alder Reaction:
• Diels Alder Reaction
Organic Chemistry 2 Final Exam Review:
• Organic Chemistry 2 Fi...

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How do you know the ppm numbers right away? I'm comparing my chemical shift table with your numbers and I am lost.

[@gardeningnm]

Looking at the middle peak of the triplet what would cause one proton to be aligned with the magnetic field and one against? Is it to do with shielding and de shielding?

[@Telawat.539]

Thanx for explanation.
Correction : 1.6 is actually upfield to the chemical shift, going to the 0.
Downfield = Deshielfed. (Both have "D" in the beginning.

[@sabahusain8112]

Kya tum mujhe smjha sakte Ho k 1.6 kaha se aaya

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[@randommeep]

how do you know the value at which the chemical shift changes? like by how much do these values change?

[@rahafrahaf73886]

Thank you!
But can someone explain how is it at the highest frequency when it's furthest down and high B°? Then alligned with the magnatic field

[@uuuuu1781]

If you have a high magnetic field (B) influencing the nucleus you have a peak at a high frequency in a NMR spectrum, and high frequency peaks are called downfield and low frequency peaks are called upfield as far as I understood.

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Could you please make a video on Pople notations in NMR?

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how do you figure out the location part for the data graph please?

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What about hydrogen splitting??

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[@deepikakose3006]

Can anyone tell .. What does splitting of protonic signals shows ??

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[@26d8]

Hi Sir, is it possible for you to make a more detailed tutorial about coupling constant, chemical shift, the effects of environment on elements, 3 bond, 4 bond and 5 bonds effects, rigid systems' splitting patterns, and HNMR and cNMR advance analysis?
Would be appreciate it.

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[@user-ql2eg3rq7x]

What is diffent between doublet of doublet and quartet? THX

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WHAT IS
THE DIFFERENCE BETWEEN COUPLING CONSTANT AND AREA OF THE 1H NMR SPECTRUM?

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[@erzas556]

What about the overlapping peaks ?

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Sir how to find upfield & downfield values

[@rachelhughes2837]

i dont understand how to know where to locate them? beginning 1.6 and 3.4? how did u figure that out? anyone tell me? thanks

[@user-dw8lv6sy2y]

유기화학을 이해함에 있어서 스핀은 중요한 개념중 하나라고 생각합니다. 이것은 스핀이 분리되고 합쳐지는 과정에서 나타나는 NMR 분석에 있어서 중요한 역할을 하지요. 이러한 이해를 위한 기초적 지식들을 충분히 학습할 수 있었습니다. 감사합니다.

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How do you know that the methyl will be 1.6?

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explain more about spin spin coupling j number

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[@davidmonroy3965]

wouldnt the CH3 for the ch3 ch2 br example be more upfield than the ch2. because the ch2 has deshielding from the very electronegative Br

[@rwayle]

Looks about right to me: i2.wp.com/www.thespectroscopy.com/wp-content/uploads/2015/04/NMR-spectrum-of-1-bromoethane.jpg
Deshielding doesn't mean it has to be super far downfield. A regular CH2 would usually show up between 1-2ppm so it being at 3-4ppm clearly shows it's deshielded.

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[@Spogeboii]

on your other video (shielded and deshielded) you say that protons that go against the magnetic field have a higher frequency due to the more energy it takes to align the proton with the magnetic field. Like going against the wwater in a current takes more energy , giving it a higher frequency

[@therealconniefrancis]

The signals refer to Ha. When Hb is aligned with the field, the Ha protons feel a slightly stronger total field (they are deshielded and they absorb at a lower field). When Hb is aligned against the external field, the Ha protons feel a slightly weaker total field.

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