Polychlorobenzenes, polybromobenzenes, and polychloropolybromobenzenes (C6H6−nXn) were photolyzed in benzene solutions; the products were analyzed by the GC/MS method. Both dehalogenation and phenylation were shown to take place competitively, producing (poly)halobenzenes bearing one less halogen atom (C6H7−nXn−1) and (poly)halobiphenyls (C6H6−nXn−1–C6H5) as the major products. Besides these products
多
氯苯、多
溴苯和多
氯多
溴苯(
C6H6−nXn)在苯溶液中光解;产物采用 GC/MS 方法分析。脱卤和苯基化都显示出竞争性,产生少一个卤素原子的(多)卤代苯(
C6H7-nXn-1)和(多)卤代
联苯( -nXn-1-
C6H5)作为主要产品。除了这些产品之外,三
联苯是通过形成的卤代
联苯的连续苯基化产生的。只有当通过
2-氯联苯的途径成为可能时,多
氯苯才会形成相应的三
联苯;然而,多
溴苯可以通过中间形成的任何异构
溴联苯产生三
联苯。还显示通过
氯原子的间迁移发生异构化的程度要小得多。