in N,N-dimethyl acetamide electrolysis, LiBH4, NiBr2biPy, mercury pool cathode, magnesium anode, sat. calomel as reference electrode, -1.3 V;

1: 28 percent / Br2 / 1,2-dichloro-benzene / 24 h / 85 °C 2: 2,2-bipyridine; bis(1,5-cyclooctadiene)nickel(0); 1,5-cyclooctadiene / dimethylformamide / 40 h / 70 - 75 °C View Scheme