in tetrahydrofuran byproducts: biphenyl; Irradiation (UV/VIS); under Ar; irradn. (254 nm) for 8 h gave deposition of Cu; decantation; deposit washed with acetone and water, and dried in vac.; it was confirmed to be pure Cu(0) by the high elec. cond. it exhibited; examn. of decanted soln. by 1H NMR spectroscopy showed presence of biphenyl and BPh3;

in tetrahydrofuran byproducts: biphenyl; Irradiation (UV/VIS); under Ar; irradn. (254 nm) for 8 h gave deposition of Cu; decantation; deposit washed with acetone and water, and dried in vac.; it was confirmed to be pure Cu(0) by the high elec. cond. it exhibited; examn. of decanted soln. by 1H NMR spectroscopy showed presence of biphenyl and BPh3;