Chemistry Letters, Vol.31, No.12, 1226-1227, 2002
Effects of para-phenyl group on the reactivities of sterically congested triplet diphenylcarbene
Bis(2,6-dibromo-4-phenylphenyl)carbene dimerizes to give tetrakis(2,6-dibromo-4-phenylphenyl)ethene, which is further photolyzed to afford 1,8-dibromo-9,10-bis(2,6-dibromo-4-phenylphenyl)-3,6-diphenylphenanthren e.