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Determination of 3J(31P31P) and 13C31P coupling constants in 1,6-diphosphatriptycene from carbon-13 n.m.r. lone pairs effects on 13C31P couplings

✍ Scribed by S. Sørensen; H. J. Jakobsen

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
342 KB
Volume
9
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^31^P^31^P and ^13^C^31^P coupling constants in 1,6‐diphosphatriptycene have been obtained from analysis of its proton decoupled ^13^C n.m.r. spectra. More accurate data, however, resulted from simultaneous analysis of the proton decoupled ^13^C spectra and ^31^P(^13^C) satellite spectra. The ^13^C^31^P couplings are strongly influenced by the proximity and orientation of the phosphorus lone pair electrons. The first ^31^P^31^P coupling in an aromatic diphosphine is reported.

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