in tetrahydrofuran reaction of Me2Sn(CCMe)2 with (Ph2PCH2PPh2)PtCl2 in THF (N2); concn. of the soln., addn. of hexane or pentane and cooling, filtering of the formed ppt., washing with hexane and drying at room temp. in vacuo;

in tetrahydrofuran reaction of Me3Sn(CCMe) with (Ph2PCH2PPh2)PtCl2 in THF (N2); concn. of the soln., addn. of hexane or pentane and cooling, filtering of the formed ppt., washing with hexane and drying at room temp. in vacuo;