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The solution conformation and rotational dynamics of tetramesityldiphosphane studied by 2-D NMR spectroscopy

Lookup NU author(s): Emeritus Professor William McFarlane

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Abstract

Detailed proton and 13C dynamic NMR and 2-D EXSY studies of tetramesityldiphosphane at a field of 11.8 T over the temperature range 193-313 K showed that rotations about the P-P bond and two types of P-Cipso bond are associated with three different barriers. This supports a gauche conformation of this molecule in solution at low temperature rather than Irans as found in the solid state, and is consistent with the pattern of coupling constants observed in the low temperature proton and I3C spectra. It can be attributed to favoured electron lone pair/lone pair interactions allied to a propeller twist of the mesityl groups which minimises their effective steric requirements. © The Royal Society of Chemistry 2000.

Publication metadata

Author(s): McFarlane W; Rees NH; Constanza L; Patel M; Colquhoun LJ

Publication type: Article

Publication status: Published

Journal: Journal of the Chemical Society, Dalton Transactions

Year: 2000

Issue: 23

Pages: 4453-4458

ISSN (print): 1477-9226

ISSN (electronic):

Publisher: Royal Society of Chemistry

URL: http://dx.doi.org/10.1039/b006421l

DOI: 10.1039/b006421l

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