X-ray Structure Analysis of a Dicopper Complex of a New Binucleating Ligand Containing a para-Xylyl Connecting Group; Large Cu…Cu Separation in [(CuCl2C18H20N3)2]·2H2O

Abstract Bimetallic coordination complexes containing two copper ions in close proximity are currently under extensive study. These structural units are known to be important in biological reactions involving molecular oxygen1 including oxygen transport,2 oxygen activation in the copper monooxygenase tyrosinase3 and the reduction of O2 in the copper oxidases.4 Examination of model systems is necessary to help elucidate the nature and mechanism of action of the copper containing active sites. In addition, model systems are of interest in studies of metal-metal interactions,5 mixed valence compounds6 and redox catalysts.6 and redox catalysts.7

[1]  P. Schaber,et al.  Preparation and crystal and molecular structure of dibromo(1,4,7-triazacyclononane)copper(II) , 1979 .

[2]  A. Martell,et al.  New multidentate ligands. 18. Synthesis of 1,4-bis(bis(2-aminoethyl)aminomethyl)benzene: binuclear chelating tendencies and mixed-ligand binuclear chelate formation , 1979 .

[3]  A. Martell,et al.  Binuclear Chelates as Oxygen Carriers. I. The Reactions of Tetrakis(2-Aminoethyl)α,α ' -Diamino-p-Xylene+ , 1979 .

[4]  C. Koval,et al.  Binuclear complexes of macrocyclic ligands: electrochemical and spectral properties of homobinuclear Cu/sup II/Cu/sup II/, Cu/sup II/Cu/sup I/, and Cu/sup I/Cu/sup I/ species including an estimated intramolecular electron transfer rate , 1979 .

[5]  A. Scozzafava,et al.  Single-crystal ESR spectra of copper(II) complexes with geometries intermediate between a square pyramid and a trigonal bipyramid , 1978 .

[6]  D. Fenton,et al.  Binuclear copper(II) complexes as mimics for type 3 coppers in metalloenzymes. 1. The importance of cooperative interactions between metals in the reversible multielectron transfer in bis(1,3,5-triketonato)dicopper(II) complexes , 1978 .

[7]  J. Lehn,et al.  Binuclear cryptates. Binuclear copper(I) and copper(II) inclusion complexes of polythia cylindrical macrotricyclic ligands. Potential models for binuclear metalloproteins , 1977 .

[8]  J. Osborn,et al.  Two-metal–substrate interactions: the reversible reaction of a CuI……CuI complex with CO and O2 , 1977 .

[9]  O. Hayaishi,et al.  Iron and Copper Proteins , 1976, Advances in Experimental Medicine and Biology.

[10]  H. S. Mason.  Binuclear copper clusters as active sites for oxidases. , 1976, Advances in experimental medicine and biology.

[11]  A. Martell,et al.  Metal complexes of the hexa(tertiary phosphine) P,P,P',P'-tetrakis(2-diphenylphosphinoethyl)-.alpha.,.alpha.'-diphospha-p-xylene , 1975 .

[12]  O. Hayaishi.  Molecular mechanisms of oxygen activation , 1974 .

[13]  A. Zuberbühler,et al.  9 – COPPER-CONTAINING OXYGENASES , 1974 .