Abstract
31P n.m.r. spectroscopy has led to the identification in solution of several ions in the series [PCl6-n (NCO) n ]− and [PCl6-n (OCN) n ]−, which were obtained by different preparative routes; isomeric configurations have been assigned by the method of pairwise interactions from the observed chemical shifts. The complexes are all unstable, and decompose readily at room temperature.