Comparison of different 2D NMR techniques for 13C, 31P correlation
✍ Scribed by Peter Bast; Stefan Berger; Harald Günther
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 496 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
Three different experimental techniques are compared to find the most efficient protocol for 2D ^13^C, ^31^P correlation spectroscopy. It is shown that the best signal‐to‐noise ratio is given by the polarization transfer experiment for ^31^P detection and by the HMQC experiment for ^13^C detection. Applications of these techniques for ^13^C,^31^P correlation of β‐nicotinamide adenine dinucleotide (NAD^+^) and a mixture of three different mononucleotides are described.
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2 D "P, "N heteronuclear shift correlation, based on a non-refocused INEPT pulse sequence with "N detection, was applied to a "N NMR study of the azadiphosphiridines 1-5 which are formed by (2 + 11 cycloaddition of iminophosphines, RP=NR'. The pulse sequence used allowed consistent assignment of bot
2-Dimethoxyphosphoryl-l,3-dithiane was obtained by the reaction of 2-ddoro-1,3&thia~~e with trimethyl phosphite. Studies at 200,360 and 400 MHz using 'H, 13C and " P nuclei and lDand 2D NMR techniques are described. Long-range coupling constants were extracted by iterative treatment of [ A B ] , C D