Dinuclear (η5-C5Me5)Ru complexes triply bridged by tellurium or selenium ligands–syntheses and characterisation of (η5-C5Me5)Ru(π2-RTeTeR)(π2-TeR)2Ru(η5-C5Me5) and [(η5-C5Me5)Ru(π2-SeR)3Ru(η5-C5Me5)]Cl (R = Tol, Ph)

Abstract

Reactions of [(η⁵-C₅Me₅)RuCl₂]₂1 with Me₃SiTeR (R = Tol, Ph; Tol =p-tolyl) produce diarylditelluride/aryltellurolate-bridged Ru^II–Ru^II complexes (η⁵-C₅Me₅)Ru(µ₂-RTeTeR)(µ₂-TeR)₂Ru(η⁵-C₅Me₅)2(2a, R = Tol; 2b, R = Ph) whereas those with Me₃SiSeR (R = Tol, Ph) yield arylselenolate-bridged Ru^III–Ru^III complexes [(η⁵-C₅Me₅)Ru(µ₂-SeR)₃Ru(η⁵-C₅Me₅)]Cl 3(3a, R = Tol; 3b, R = Ph); both 2a and 3a are fully characterised by X-ray crystallography.