Phosphorus—nitrogen compounds. Part 57—variable-temperature phosphorus-31 nuclear magnetic resonance spectroscopy of some phenyl-substituted cyclotriphosphosphazatrienes
✍ Scribed by W. Francis Deutsch; Harold G. Parkes; Robert A. Shaw
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 511 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
The temperature dependence of the 31P NMR spectra of N,P,Cl, , phenyl-substituted cyclotriphosphazatrienes, N,P,PhnC1,-, (n = 2,4,6), and a series of derivatives, N,P,Ph,[X(CH,),~Cl, (where X = Y = 0, NH, n = 2, 3, 4; X = Y = NMe, n = 2, 3; X = NH, Y = NMe, n = 9, of gem-N,P,Ph,Cl, was studied. Differential changes in chemical shift as a function of temperature were observed between different "P nuclei. In a number of cases second-order effects could be greatly reduced through a change in temperature. The temperature dependence of the 31P shift was found to differ with solvent, for example when CDC1,replaced CD,Cl, .