Structure of Two New Compounds of Copper(I) Iodide with N-Donor and P-Donor Ligands

The copper(I) halides complexes present a large structural variety and have numerous technological applications. In this work we have prepared two new copper(I) complexes with N-donor and P-donor ligands [CuI(2-(diphenylphosphino)benzaldehyde)2] (1), [CuI(2-(diphenylphosphino)benzaldehyde) (acetonitrile)]2 (2) from CuI as starting material. The complexes were characterized by elemental analysis, IR spectroscopy and crystallographic studies. Compound 1 crystallizes in a monoclinic C2/c space group. It is a monomer with a P-donor ligand bound with copper(I) in a distorted triangular planar geometry. Compound 2 crystallizes in monoclinic P21/c space group. It has two molecules of the P-donor ligand and two molecules of the N-donor ligand in trans configuration, forming a dimer with two bridging iodides. The Cu(I) atom is four coordinated in trigonal pyramidal geometry with τ4 value of 0.85. The bond distances are 2.5050(6)-2.7090(6) Å for Cu–I, 2.044(4) Å for Cu–N and 2.2489(8)-2.2528(8) Å for Cu–P.