PPh3 in toluene air-free technique; toluene was distd. to Pd-Ge complex and PPh3; CO (1 atm) added; soln. stirred for 8 d; volatiles evapd.; toluene distd.; CO (1 atm) added; soln. stirred for 12 d; volatiles removed; C5H12 added; filtered; volatiles from filtrate removed ; redissolved in C6H6; CuCl added; stirred for 15 min; volatiles removed; suspnd. in C5H12; filtered; volatiles removed; dissolved in C6H6; passed through silica gel; elem. anal.;