Chemistry of ruthenium σ-borane complex, [Cp∗RuCO(μ-H)BH2L] (Cp∗ = η5-C5Me5; L = C7H4NS2) with terminal and internal alkynes: Structural characterization of vinyl hydroborate and vinyl complexes of ruthenium. (29th March 2017)

• Record Type: Journal Article
• Authors: Saha, Koushik; Joseph, Benson; Borthakur, Rosmita; Ramalakshmi, Rongala; Roisnel, Thierry; Ghosh, Sundargopal
• Is Part Of: Polyhedron. Volume 125(2017)
• Page Start: 246
• Page End: 252
• Publication Date: 2017-03-29
• Subjects: Ruthenium -- Alkyne -- Vinyl -- Hydroboration -- Borane; Chemistry, Inorganic -- Periodicals; Chimie inorganique -- Périodiques; Organometaalverbindingen; Anorganische chemie; 546.05
• DOI: 10.1016/j.poly.2017.01.003
• Languages: English
• ISSNs: 0277-5387

Abstract

Graphical abstract: Reaction of ruthenium σ-borane complex [Cp ∗ RuCO(μ-H)BH2 L] (Cp ∗ = η 5 -C5 Me5 ; L = C7 H4 NS2 ) with alkynes form ruthenium vinyl hydroborate and vinyl complexes. Abstract: The chemistry of ruthenium–borane complex, [Cp ∗ RuCO(μ-H)BH2 L] (Cp ∗ = η 5 -C5 Me5 ; L = C7 H4 NS2 ), 1 with various alkynes has been explored. Photolysis of1 with alkynyl-Grignard, [HCCMgBr] in toluene led to the isolation of vinyl hydroborate complex [Cp ∗ Ru(μ-H)BH{HCCH2 }L], 2a as a sole product. Compound2a can be viewed as a ruthenium–borate complex with an ethylene moiety. Further, the chemistry of1 with various internal and terminal alkynes has been performed in photolytic conditions. Photolysis of1 with [RCCR] (R = CO2 Me) yielded vinyl hydroborate complex [Cp ∗ Ru(μ-H)BCl{RCCR}L], 2b . Terminal alkynes [HCCR] (R = Ph or CO2 Me) under the same reaction conditions led to the isolation of metal vinyl complexes [Cp ∗ Ru(CO)(C2 HR)(L)], 3a and3b (3a : R = Ph;3b : R = CO2 Me). In addition, DFT calculations were carried out to analyze the bonding and electronic structures of these new compounds.