F. Khajenouri et al., CU-63 NQR STUDIES OF 3-COORDINATED COMPLEXES OF CU(I) WITH AN ISOCYANIDE LIGAND, Zeitschrift fur Naturforschung. A, A journal of physical sciences, 53(6-7), 1998, pp. 599-602
The Cu-63 NQR spectra of five three-coordinated complexes of Cu(I) con
taining an isocyanide ligand are reported. The resonance frequencies a
re compared with those of other three-coordinated Cu(I) complexes usin
g a partial coupling constant model to describe the effects of the var
ious ligands and to take into account the effects of variations in the
molecular geometries. The partial coupling constant of the isocyanide
ligand is much higher than that of any other ligand studied so far an
d leads to the order of donor atom partial field gradients for termina
l ligands C >N > Cl > P approximate to S approximate to Br > I > O.