Oxidative addition of diferrocenyl dichalcogenides to [{Ru(η5-C5Me5)(µ3-Cl)}4]. Syntheses, crystal structures and some reactivities of [{Ru(η5-C5Me5)Cl(µ-ER)}2](E = S, Se or Te; R = ferrocenyl)

Abstract

Reaction of [{Ru(η⁵-C₅Me₅)(µ₃-Cl)}₄] with 2 equivalents of REER (E = S, Se or Te; R = ferrocenyl) gave novel ferrocenylchalcogenolate-bridged diruthenium complexes [{Ru(η⁵-C₅Me₅)Cl(µ-ER)}₂] in good yields. Reduction of these by sodium amalgam in the presence of buta-1,3-diene afforded [{Ru(η⁵-C₅Me₅)(µ-ER)}₂(µ-s-trans-η²:η^2′-CH₂CHCHCH₂)], whereas treatment with AgOSO₂CF₃ produced the co-ordinatively unsaturated complexes [Cl(η⁵-C₅Me₅)Ru(µ-ER)₂ Ru(η⁵-C₅Me₅)][OSO₂CF₃]. The structures of five of the complexes have been defined by X-ray crystallography.