Di-μ-iodido-bis-{[(R)-(+)-2,2′-bis-(di-phenylphosphanyl)-1, 1′-binaphthyl-κ 2 P,P′]copper(I)} 0.67-hydrate

Abstract

The structure of the title compound, [Cu 2I 2(C 44H 32P 2) 2]·0.67H 2O, has been determined because of its inter-esting catalytic and optical features. The mol-ecule, which has non-crystallographic C2-symmetry, consists of a core structure of two Cu I ions, bridged by two iodide ions. Each Cu I ion is also coordinated by one equivalent of the chiral bidentate (R)-BINAP ligand [BINAP = 2,2′-bis-(diphenyl-phosphan-yl) -1,1′-binaphth-yl]. Thus, both cations show a distorted tetra-hedral geometry being surrounded by two I atoms and two P atoms from the (R)-BINAP ligands. The complex consists of isolated butterfly-shaped mol-ecules featuring an angle of 146.11 (2)° between adjacent CuI2 planes. The structure displays intra-molecular C-H⋯I hydrogen bonding and contains disordered water. The absolute configuration of this chiral complex was determined by anomalous dispersion effects.