CU-63 NQR AND STRUCTURAL STUDIES OF COMPLEXES FORMED BETWEEN CU(I) HALIDES AND TRIS(O-METHOXYPHENYL)PHOSPHINE OR TRIS(P-TOLYL)PHOSPHINE LIGANDS

The crystal structure of [tri(o-methoxyphenyl)phosphine](2)Cu2Br2 show s it to be a halogen-bridged dimer with three-coordinated Cu(I) sites. The Cu-63 NQR frequency of the corresponding chloride indicates that it has a similar structure. The Cu-63 NQR frequencies of the complexes of tri(p-tolyl)phosphine, L3Cu2X2, with cuprous chloride and bromide are consistent with their having halogen-bridged structures with both three- and four-coordinated Cu(I) sites analogous to those formed by t riphenylphosphine and tri(m-tolyl)phosphine. Cu(I) sites. [CuBr(P(C7H7 O)(3)](2); Triclinic, P (1) over bar, Z=2, a=8.969(1), b=10.510(2), c= 11.428(2) Angstrom, alpha=99.46(1), beta=97.95(1), gamma= 104.17(1)de grees, R=3.5%, R-omega=2.2%.