dihydrogen hexachloroplatinate

Speier's catalyst

in diethyl ether

1: 2,6-dibromohex-1-ene With magnesium; ethylene dibromide in tetrahydrofuran T=10 - 20°C; 4 h; 2: dichloro(3-chloropropyl)phenylsilane in tetrahydrofuran 1.4 h; Heating;