Tagged questions

Why is chemical shift range of 13C wider than of 1H nuclei?

6 3 15178
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Why the chemical shift range of 1H nmr is ~20 ppm wheras for 13C nmr it is ~230 ppm? ...
Posted: sameer deka 31 / Updated: Yoan Monneau 136 Feb 15 '11 at 11:23

Very simple NMR question wrt resonance frequency calculation

6 0 15096
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Hi guys, I'm stuck in attempting this question and need some help understanding how to answer it. Q.) The chemical shif...
Posted: Will Whitehouse 1 / Updated: SankarampadiAravamudhan 91 Apr 02 '14 at 00:25

Are there ways to explain magnetic-field dependent chemical shift?

4 1 10491
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Hi everyone, I was wondering whether anyone could help me to explain why the chemical shifts in my proton and carbon NM...
Posted: Guga Hollows 11 / Updated: Arkadiusz Leniak 238 May 31 '14 at 15:46

two triplets and no quartet?

4 1 5k
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Hello all, I have spent approximately 4 hours trying to analyze an H NMR consisting of two doublets of doublets (pe...
Posted: Kelsey O'Dell 11 / Updated: joenmr 1 Feb 18 '15 at 10:44

Simple 1H-NMR Assignment Query

4 1 3k
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Hi guys, sorry to be really cheeky and sign up simply to ask for help, but here goes. I've done a simple Grignard addit...
Posted: Brianstorm 11 / Updated: 3nath 11 Oct 26 '11 at 12:53

High Pressure NMR Samples

3 0 4k
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I need to run NMR on samples of anhydrous ammonia. The boiling point of anhydrous ammonia is -33.34 deg C. In order to...
Posted: grant 1 / Updated: Damodaran Krishnan Achary 21 Feb 28 '12 at 14:09

Longer pulse length for conducting samples?

3 0 4k
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Hi, my 1H 90 deg pulses are always longer when I work with my samples that are electrically conducting. Is this a/the re...
Posted: Santhosh 1 / Updated: glass lizard 31 Aug 12 '12 at 12:24

Absence of some signals on 1H and 13C spectra of polyaromatic carboximidate

3 0 4k
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Hi, I have encountered a strange behaviour of some signals (they are absent) in a series of polycyclic aromatic carboxi...
Posted: Arkadiusz Leniak 238 / Updated: zablociak 21 Mar 23 '15 at 12:11

Inverted Spinning Sidebands

2 0 5k
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Hello, My 1H MAS NMR spectrum comes out with the right spinning side band pointing up and the left one pointing down. ...
Updated: NMRUser61581 13 Jan 03 '11 at 10:04


2 0 4k
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Hey everyone, I've started practicing reading NMR again after having not done so for years, and I'm getting caught up o...
Posted: John Xavier 1 / Updated: Pete Gierth 401 Jun 17 '13 at 12:06

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