B–C Bond Cleavage and Ru–C Bond Formation from a Phosphinoborane: Synthesis of a Bis-σ Borane Aryl-Ruthenium Complex

Audrey Cassen (1) , Laure Vendier (1) , Jean-Claude Daran (1) , Amalia Poblador-Bahamonde (2) , Eric Clot (2) , Gilles Alcaraz (1) , Sylviane Sabo-Etienne (1)

1 LCC - Laboratoire de chimie de coordination
2 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

Compared with the reactivity of o-Ph2P(C6H4–CH2)BH(NiPr2) with [RuH2(η2-H2)2(PCy3)2], the behavior of the phosphinoborane Ph2P(CH2–C6H4)BH(NiPr2) is radically different. No agostic σ-B–H complex could be observed, the reaction leading to the isolation of a new bis-σ borane aryl-ruthenium complex via B–C bond cleavage and Ru–C bond formation. Reactivity studies of this complex with dihydrogen and/or HBArF4 as a proton source enable the formation of a tethered chiral-at-Ru piano-stool cationic complex.

Domaines: Chimie-Physique [physics.chem-ph]; Chimie de coordination

Audrey Cassen, Laure Vendier, Jean-Claude Daran, Amalia Poblador-Bahamonde, Eric Clot, et al.. B–C Bond Cleavage and Ru–C Bond Formation from a Phosphinoborane: Synthesis of a Bis-σ Borane Aryl-Ruthenium Complex. Organometallics, 2014, 33, pp.7157-7163. ⟨10.1021/om500972f⟩. ⟨hal-01098138⟩