hydrogenchloride in diethyl ether to cooled soln. of Ph2MeSnMn(CO)5 in Et2O added dropwise HCl in Et2O, mixture left overnight; evapd., mixture chromd. (SiO2, C6H6/petroleum ether 1/3, 40°C);

in tetrahydrofuran soln. of Ph3P(CO)3CoNa in THF added to soln. of Ph2MeSnMn(CO)5 in THF under N2, reaction time 3 h; solvent evapd., chromd., NMR, IR;