title: Carbon dioxide hydrosilylation promoted by cobalt pincer complexes.
abstract: The addition of carbon dioxide to ((tBu)PNP)CoH [(tBu)PNP = 2,6-bis(di-tert-butylphosphinomethyl)pyridine] resulted in rapid insertion into the Co-H bond to form the corresponding κ(1)-formate complex, which has been structurally characterized. Treatment of ((tBu)PNP)CoH with PhSiH3 resulted in oxidative addition to form trans-((tBu)PNP)CoH2(SiH2Ph), which undergoes rapid exchange with excess free silane. With 0.5 mol % ((tBu)PNP)CoH, the catalytic hydrosilylation of CO2 with PhSiH3 to a mixture of oligomers containing silyl formate, bis(silyl)acetyl, and silyl ether subunits has been observed.
authors.affiliation: Frick Laboratory, Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States.
authors.forename: Margaret L
authors.initials: ML
authors.lastname: Scheuermann
authors.forename: Scott P
authors.initials: SP
authors.lastname: Semproni
authors.forename: Iraklis
authors.initials: I
authors.lastname: Pappas
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Chirik