Di-μ-iodido-bis{[(R)-(+)-2,2′-bis(diphenylphosphanyl)-1,1′-binaphthyl-κ2P,P′]copper(I)} 0.67-hydrate

Abstract

The structure of the title compound, [Cu₂I₂(C₄₄H₃₂P₂)₂]·0.67H₂O, has been determined because of its interesting catalytic and optical features. The molecule, which has non-crystallographicC2-symmetry, consists of a core structure of two Cu^Iions, bridged by two iodide ions. Each Cu^Iion is also coordinated by one equivalent of the chiral bidentate (R)-BINAP ligand [BINAP = 2,2′-bis(diphenylphosphanyl)-1,1′-binaphthyl]. Thus, both cations show a distorted tetrahedral geometry being surrounded by two I atoms and two P atoms from the (R)-BINAP ligands. The complex consists of isolated butterfly-shaped molecules featuring an angle of 146.11 (2)° between adjacent CuI₂planes. The structure displays intramolecular C—H...I hydrogen bonding and contains disordered water. The absolute configuration of this chiral complex was determined by anomalous dispersion effects.