1: {2-[4-(2-ethoxyethoxy)phenyl]ethyl}-[3-(n-hexyl)thiophen-2-yl]di-para-tolylgermane With boron trichloride; methyloxirane in n-heptane; dichloromethane T=-78°C; 0.666667 h; 2: 2,3-dimethylbutane-2,3-diol in n-heptane; dichloromethane T=20°C; Further stages.;

methyloxirane in dichloromethane (N2); treatment of germanium compd. with propilene oxide and boron compd. in CH2Cl2 at -78°C and then with pinacol room temp.;