in dichloromethane Addn. of AgClO4 to a CH2Cl2 soln. of Pt-complex and stirring of mixt. (exclusion of light, room temp., 2 h).; Filtn. of formed AgCl, evapn. of resulting yellow soln. to dryness and treatment of obtained oily residue with O(C2H5)2 to separate the insoluble org. compd. Evapn. of ether soln. to dryness gives a solid.;

in diethyl ether; dichloromethane Addn. of AgClO4 to a CH2Cl2 soln. of Pt-complex (molar ratio 2:1) and stirring of mixt. (exclusion of light, room temp., 2 h).; Filtn. of formed AgCl and of excess of AgClO4, evapn. of resulting yellow soln. to dryness and washing of obtained oily residue with O(C2H5)2 to separate the insoluble org. compd. Partial evapn. of yellow soln. and addn. of n-hexane gives a solid.;