Di-l-iodido-bis{[(R)-(+)-2,20-bis(di- phenylphosphanyl)-1,10-binaphthyl- j2P,P0]copper(I)} 0.67-hydrate

atom completeness 98%; disorder in solvent or counterion; R factor = 0.030; wR factor = 0.081; data-to-parameter ratio = 18.4. 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-crystallographic C2-symmetry, consists of a core structure of two CuI ions, bridged by two iodide ions. Each CuI ion is also coordinated by one equivalent of the chiral bidentate (R)-BINAP ligand [BINAP = 2,20-bis(diphenylphosphanyl)-1,10-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 CuI2 planes. The structure displays intra-molecular C—H I hydrogen bonding and contains disor-dered water. The absolute configuration of this chiral complex was determined by anomalous dispersion effects. Related literature For the photophysical properties of the title compound, see: Kunkely et al. (2008) and of analogous complexes see: Bala-murugan et al. (2001); Hashimoto et al. (2011); Hattori et al