63,65 Cu and 79,81 Br NQR Studies of Halogenocuprate Complexes of Triphenylphosphine

63,65 Cu and 79,81 Br spectra of halogenocuprate (I) complexes containing [CuPPh 3 X 2 ] - (X = Cl, Br, I) anions with different cations were recorded in the range 77 K -300 K. The results confirm the previous trend that, for a given ligand, 63 Cu NQR frequencies are in the order Cl> Br > I. 63 Cu NQR frequencies in [CuPPh 3 X 2 ] - are compared with those in neutral Cu(Ph 3 ) 2 X(X = Cl, Br) complexes and with the [CuX 2 ] - (X = Cl, Br) anions, other three-coordinate Cu(I) complexes.