1-Bromo-4-chloro-2-fluorobenzene is a polyhalo substituted benzene. It undergoes Suzuki coupling with 2-cyanoarylboronic esters to form the corresponding biphenyls. These biphenyls are the precursors for synthesizing 6-substituted phenanthridines. ? The enthalpy of vaporization at boiling point (467. 15K) of 1-bromo-4-chloro-2-fluorobenzene is 40. 737kjoule/mol. {4}