Unanswered questions

Bruker AV500 TOPSHIM error

1 0 718
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Hi, I'm having a problem with topshim on Bruker AV 500 using topspin 2.1. it finishes with error (topshim: FieldMap - no...
Posted: jrlopez 1 / Updated: Jim Lin 1 Apr 14 '15 at 06:23

nmr phenylethylamine

2 0 998
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hello...i know only the basics on nmr and need some help :i need H-NMR help with phenylethylamine Phe-CH2-CH2-NH-R - how...
Posted: ann choroshun 1 / Updated: Jim Lin 1 Apr 09 '15 at 07:59

Distorted/antiphase signals when doing Dosy

5 0 731
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Hello, I am running Dosy experiment using ledbpgp2s sequence. I am getting sort of signal distortions. I tried the solu...
Posted: Umayal Rakesh 1 / Updated: gravatar 83 Jun 08 '15 at 03:44

31P-31P COSY

1 0 803
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I like to run a 31P-31P COSY experiment to determine whether there is coupling between 1R-31P-CH2-31P-X in my molecule. ...
Updated: Jim Lin 1 Apr 09 '15 at 07:54

splitting QCPMG echo train

0 0 320
answers votes views
Hi all, I'm running qcpmg (qcpmgaq), using bruker topspin3. Does anyone have a suggestion how to split the echos train? ...
Posted: shon roni 1 Mar 23 '15 at 04:07

How to calcualte eoors in ppm from Hz of Hsqc data?

1 0 522
answers votes views
Hi all, I want to calculate error in ppm from my Hsqc data. My spectrometer yields X1axis, Y1Axis, DX1, DY1, X1ppm, and ...
Posted: ick lad 1 / Updated: Arkadiusz Leniak 238 Mar 17 '15 at 02:10

Why NMR can deliver angstrom reolution structures.

1 0 505
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How can NMR operating at radiofrequency wavelengths deliver angstrom resolution? For example X-ray crystallography opera...
Posted: Anon 1 / Updated: Arkadiusz Leniak 238 Mar 17 '15 at 01:10

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

3 0 1k
answers votes views
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

reading Bruker phase data

1 0 496
answers votes views
Hi all, I'm having trouble reading the 2dseq file for a scan I ran. It should contain 2 slices of 66x50 voxels, repeate...
Updated: Nicholas E 11 Mar 13 '15 at 10:53

Mechanism of chemical exchange between labile protons (OH, NH, SH)

1 0 729
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Hello All Does anyone know of any good articles dealing with the mechanisms of labile proton exchange in non-aqueous so...
Posted: Craig 41 / Updated: gravatar 83 Mar 09 '15 at 02:28
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