PPh3 in dichloromethane Addn. to a CH2Cl2 soln. of Pt2Ag-compd. of an equimolar amt. of PPh3 and stirring of mixt. (exclusion of light, room temp., 2 h).; Evapn. of soln. to dryness and washing of resulting solid with n-hexane.;

in dichloromethane Addn. to a CH2Cl2 soln. of Pt-compd. of an equimolar amt. of PPh3 and stirring of mixt. (exclusion of light, room temp., 30 min).; Evapn. of soln. to dryness.;