CrCl3(THF)3 in acetonitrile Kinetics; byproducts: CrCl2; under inert atmosphere; mixt. of carbonyl anion and excess CrCl3*3THF in CH3CN at 25°C, monitored by IR until react. was complete; evapn., extn. (hexanes), sepn. (column chromy.), characterized by IR;

in dichloromethane cooling soln. of (CF3SO3)(HRu2(CO)5((CH3)2CHNCHCHNCH(CH3)2)) (0.24 mmol) in CH2Cl2 to -60°C (CO2/ethanol bath); addn. of 1.5 equiv. of Mn(CO)5(1-) in THF; stirring for 30 min; slowly warming to room temp. after removal of CO2/ethanol bath;; evapg. to dryness; sepn. by column chromy., elution with ligroin; elem. anal.;;

in tetrahydrofuran Kinetics; byproducts: Br(1-); under inert atmosphere; mixt. of carbonyl anion and carbonyl halide (molar ratio 1:1) in THF at 25°C, monitored by IR until react. was complete; concn., extn. (hexane), sepn. (column chromy.), characterized by IR;