X-Ray structural analyses of the compounds [PhP(S)NC6H4X]2,(1)(X =o-Me) and (2)(X =o-OMe), show that steric crowding is relieved in (1) by rotation about the C–N bond and in (2) by bending of this bond; the results are correlated with 31P chemical shift n.m.r. measurements in related substituted N-Phenylcyclodiphosph(V)azanes.
P. G. Owston, L. S. Shaw (née Gözen), R. A. Shaw and D. A. Watkins, J. Chem. Soc., Chem. Commun., 1982, 16 DOI: 10.1039/C39820000016
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