Kinetics of carbon-13-labeled carbon monoxide exchange with 12CO in [HM3(CO)11]- and [DM3(CO)11]- (M = ruthenium, osmium): study of the effects of ion pairing and deuterium labeling on the exchange process and hydride activation

Rates of exchange of 13 CO gas (0.1-6.0 atm) with 12 CO in [HM 3 ( 12 CO) 11 ] − and [DM 3 ( 12 CO) 11 ] − (M=Ru, Os) were determined. The appearance of 12 CO in the gas phase above tetrahydrofuran solutions of the cluster salts was monitored by IR spectroscopy as a function of time. Overall 13 CO- 12 CO exchange occurs by two parallel pathways