Heterobimetallic Re–Pd, Re–Au and Re–Cu complexes derived from diphenylphosphino cyrhetrene: Synthesis and X-ray structure
摘要:
Diphenylphosphinecyrhetrene ligand (eta(5)-C5H4PPh2)Re(CO)(3) (1) reacts with 1 equiv. of PdCl2(NCPh)(2) to form, after workup, the square-planar trans-[(eta(5)-C5H4PPh2)Re(CO)(3)]PdCl2(NCMe) (2). Similarly, reaction of 1 with (tetra hydrothiophene)AuCl produces, in excellent yield, the bimetallic complex [(eta(5)-C5H4PPh2)Re(CO)(3)]AuCl (3) with a linear P-Au-Cl moiety. From the reaction of 2 equiv. of 1 with CuBr(SMe2) the planar-trigonal complex [(eta(5)-C5H4PPh2)Re(CO)(3)](2)CuBr (4) was obtained. P-31 NMR and X-ray crystallography demonstrate, for the three cases, that (eta(5)-C5H4PPh2)Re(CO)(3) acts as a monodentate ligand. The structural parameters of the bimetallic complexes are compared with related diphenylphosphinoferrocene metal complexes, described in the literature. (c) 2008 Elsevier Ltd. All rights reserved.