Tagged questions

why choloroform gives a negative triplet instead of a positive

2 0 78
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Hello, why choloroform gives a negative triplet instead of a positive(just one hydrogen on the carbon) in DEPT 135. Can ...
Updated: zikoooo 1 1 hour ago

Running a 13C{19F} spectrum on a Bruker Instrument?

1 0 989
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My apologies in advance for the very "beginner" nature of my question : ) We are interested in examining a carbon spect...
Posted: nmrbeginner 1 / Updated: Charlie Fry 91 Jan 23 at 07:32

Help solving a spectrum!

2 0 818
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Can someone please help me solve an nmr problem? I've tried a lot but can't get it. Please post ur email and i'll send y...
Posted: Lyra 1 / Updated: vaclavrimal 11 Aug 08 '13 at 04:44

!3C NMR of Peptide

0 0 397
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Hi, thank you for reading my question. I am a novice at NMR, I apologize in advance if my question appears naive. I am ...
Posted: pjb 1 Jun 11 '13 at 00:32

13C NMR of sulfated galactose

0 0 799
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Hi everybody, Has anyone ever seen a C-6 at 64 ppm in the 13C NMR spectrum of a sulfated galactose? ...
Posted: nvgramosa 1 Jan 16 '12 at 18:27

Method for indirect 13C-1H J-couplings measurements

5 1 2k
answers votes views
Dear colleagues! 13C-1H J-couplings are essential in some areas of molecule structure research. I discovered modern met...
Updated: VVK 51 Nov 29 '11 at 12:37

two triplets and no quartet?

3 1 2k
answers votes views
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: sekhar Talluri 601 Mar 20 '11 at 11:29

Distinguish between protonation and conformational change?

2 1 1k
answers votes views
Hi all, In a folded protein with 13C-delta labeled glutamates, how can one distinguish between chemical shift due to pr...
Posted: RCKC 11 / Updated: SankarampadiAravamudhan 91 Feb 27 '11 at 22:59

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

6 3 5k
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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
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