magnesium; dibromoethane in tetrahydrofuran under N2, Schlenk techniques; Mg turnings suspended in THF activated with a few drops of dibromoethane; (EtO)4Ge in THF added; 10percent soln. of bromothiophene in THF added; rest of soln. slowly added (1 h) to maintain boiling; refluxed for ca. 90 min; solvent removed in vac.; extd. with pentane; extract filtered; solvent removed in vac.; 94percent 2-(tri(ethoxy)germyl)thiophene and 6percent di(ethoxy)di(2-thienyl)germane obtained, total yield 33percent;

magnesium 1.) ether, 2.) THF, heated in a water bath for 1 h; Product distribution;