MIXED-LIGAND OXORHENIUM(V) COMPLEXES WITH RHENIUM-SELENIUM BONDS. MOLECULAR STRUCTURE OF (3-OXAPENTANE-1.5-DITHIOLATO)-(BENZENESELENOLATO)OXORHENIUM(V)

Abstract

Mixed ligand oxorhenium(V) complexes [ReO(SXS)(SeR)] containing terdentate dithiol ligands HS-CH₂CH₂-X-CH₂CH₂-SH (HSXSH, X = O,S) and benzeneselenol or benzylselenol, RSeH (R = C₆H₅, CH₂-C₆H₅) as monodentate ligands have been synthesized and characterized by spectroscopic and X-ray crystallographic methods. X-ray structure analysis of complex 3 (X = O, R = C₆H₅) shows that the rhenium coordination number is five and the coordination polyhedron is a square pyramid. Structure and spectroscopic data of the complexes are close to those of the corresponding sulphur (RSH as monodentate ligand) compounds.

Key Words:

• Rhenium complexes
• selenols
• X-ray structure