Two modes of C–H bond activation of tris(2-thienyl)phosphine in trinuclear osmium carbonyl clusters

摘要: Abstract Tris(2-thienyl)phosphine, P(C 4 H 3 S) , reacts with [Os (CO) 12 ] at 110 °C to give the phosphine-substituted derivatives 11 {P(C }] ( 1 ), 10 } 2 ) and 9 as well C–H activated product (μ-H)(CO) {μ-P(C S)(C }{P(C in which bridging ligand is equatorially coordinated two osmium atoms. Thermolysis of refluxing toluene results formation . Compound can also be prepared high yield from (NCMe)]. The reaction (μ-H) tris(2-thienyl)phosphine room temperature afforded 5 H(μ-H)(CO) 6 through phosphorus atom whereas elevated cyclometallated compounds {μ -P(C 7 8 were obtained addition Heating heptane furnished via loss one carbonyl ligand. gives respectively, good yields. In μ-P(C Os a σ –Os–C bond second atom. contains μ bound atom, another by an η (π)-interaction third Compounds contain exclusively crystal molecular structures are reported.