文摘
Detailed kinetic studies were performed on the reaction of [RuII(terpy)(bpy)H]+ (terpy = 2,2鈥?6鈥?2鈥?terpyridine; bpy = 2,2鈥?bipyridine) with CO2 in conventional solvents (water, methanol, and ethanol) and in the ionic liquid [emim][NTf2] ([emim] = 1-ethyl-3-methyl-imidazolium; [NTf2] = bistrifluoromethylsulfonylamide). Second-order rate constants and activation parameters (螖H, 螖S, and 螖V) were determined for the reaction in all solvents. The second-order rate constants correlate with the acceptor number of the solvent, whereas the activation parameters support the associative nature of the reaction. The results in water, especially the activation entropy (+14 卤 2 J K鈥? mol鈥?) and activation volume (鈭?.9 卤 0.6 cm3 mol鈥?), differ significantly from those found for the other solvents.