triphenyl phosphine in dichloromethane a stoich. amount of PPh3 was added to a CH2Cl2 soln. of Rh2Cu-cluster under N2, mixt. was stirred for ca. 30 min at room temp.; evapd., residue was extd. with Et2O, Rh2-complex was isolated from the ext., solid residue was identified as Cu(PPh3)Cl;