14N–31P, 15N–15P, and 31P–31P coupling constants from the 31P nuclear magnetic resonance spectra of square planar platinum(II) and palladium(II) thiocyanate complexes
Abstract
The 31P n.m.r. spectra of cis-PtX2[P(OPh)3]2(X = CNS, C15NS) show the independent existence of dithiocyanato, diisothiocyanato and mixed linkage isomers in solution, and the appearance of distinct resolvable 31P–31P, 14N–31P and 15N–31P coupling in the spectra of the mixed species suggests a means of measuring these couplings in co-ordination complexes.