Further kinetics studies of intermediates formed by flash photolysis of Mo(CO)6

Kinetics studies of the behavior of Mo(CO)5(CH) in the presence of radical initiators were conducted in cyclohexane (CH) solution by laser flash photolysis with time-resolved infrared detection. Activation parameters were determined for reactions of Mo(CO)5(CH) with toluene and with photochemical radical generator dibenzylketone (DBK) in the presence of excess CO.

Flash photolysis of Mo(CO)6 in cyclohexane (CH) solution leads to the reversible formation of the pentacarbonyl complex Mo(CO)5(CH) (I). I reacts with toluene or dibenzylketone to give Mo(CO)5(L) with rates and activation parameters indicating a dissociative interchange mechanism. Simultaneous generation of benzyl radicals had little effect on these pathways.Figure optionsDownload as PowerPoint slide