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Dibromobiphenyl reacted with cynomethyl anion in ammonia under irradiation to form nucleophilic bis-substituted product in high yield without substantial monosubstituted product. Quantum yields for the formations of bis- and monosubstituted products were found to be 85.6 and 2.3×10-6 respectively, while the corresponding pseudo-first-order rates were 6.9×10-3 and 5.2×10-10 mol.L-1.S-1. Block up the possible electron transfer of 4-brome-4’-cyanomethylbiphenylyl radical anion to 4-cyanometbyl-biphenylyl radical and bromine ion.
Dibromobiphenyl reacted with cynomethyl anion in ammonia under irradiation to form nucleophilic bis-substituted product in high yield without substantial monosubstituted product. Quantum yields for the formations of bis- and monosubstituted products were found to be 85.6 and 2.3 × 10-6 respectively, while the The corresponding pseudo-first-order rates were 6.9 × 10 -3 and 5.2 × 10 -10 mol·L -1 .S-1. Block up the possible electron transfer of 4-brome-4’-cyanomethylbiphenylyl radical anion to 4-cyanometbyl -biphenylyl radical and bromine ion.