Copper-63,65 nuclear quadrupole resonance of complexes of copper(I) halides with phosphorus-containing ligands
Abstract
The 63Cu NQR spectra have been recorded for ten complexes of Cu1 with phosphine and halide ligands that, either on the basis of their previously determined crystal structures or of their analogy to complexes of known structure, were believed to contain three-co-ordinated copper atoms. The NQR resonance frequencies support these attributions and the structure determination of two of the complexes, [{CuX(L)}2][X = Cl or Br, L = P(C6H4Me-o)3], confirms the co-ordination number of three. The NQR results indicated that the previously reported structure for [Cu4Br4(Ph2PCH2PPh2)2] was incorrect and a redetermination of the structure confirmed this conclusion.