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Phosphorus—nitrogen compounds. Part 57 —variable‐temperature phosphorus‐31 nuclear magnetic resonance spectroscopy of some phenyl‐substituted cyclotriphosphosphazatrienes
Author(s) -
Deutsch W. Francis,
Parkes Harold G.,
Shaw Robert A.
Publication year - 1988
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260260708
Subject(s) - chemistry , phosphorus , nitrogen , nuclear magnetic resonance spectroscopy , chemical shift , solvent , spectroscopy , resonance (particle physics) , analytical chemistry (journal) , stereochemistry , organic chemistry , physics , particle physics , quantum mechanics
The temperature dependence of the 31 P NMR spectra of N 3 P 3 Cl 6 , phenyl‐substituted cyclotriphosphazatrienes, N 3 P 3 Ph n Cl 6‐n ( n = 2, 4, 6), and a series of derivaties, N 3 P 3 Ph 2 [X(CH 2 ) n Y]Cl 2 (where X = Y = O, NH, n = 2, 3, 4; X = Y = NMe, n = 2, 3; X = NH, Y = NMe, n = 3), of gem ‐N 3 P 3 Ph 2 Cl 4 was studied. Differential changes in chemical shift as a function of temperature were observed between different 31 P nuclei. In a number of cases second‐order effects could be greatly reduced through a change in temperature. The temperature dependence of the 31 P shift was found to differ with solvent, for example when CDCl 3 replaced CD 2 Cl 2 .