in hexane Irradiation (UV/VIS); (N2); to hexane soln. of Ru complex was added W compd. and stirred soln. was irradiated for 20 min, solvent removed in vac.; residue chromd. (TLC, hexane/CH2Cl2 85:15); elution order: 1. Ru3(CO)12, 2. main product; elem. anal., 3. Ru phosphino complex, elem. anal.;