in n-heptane dissolving Pt2Ru4(CO)18 (0.023 mmol) and PhC2Ph (0.056 mmol) in heptane at 40-50°C; heating to reflux (97°C) for 10 min; cooling to 25°C;; removal of solvent on rotary evaporator; sepn. of residue by thin layer chromy.; elution with CH2Cl2/hexane (3:7); elem. anal.;;