The number of cationic bromine and chlorine compounds is restricted.
溴、氯阳离子化合物的数量受局限。
2
In general, the activity of the halide component of the initiator increases with the number of chlorine or bromine atoms joined to a single carbon atom.
一般说来，引发剂的卤化物组份的活性，是随连在同一碳原子上的氯和溴原子的数目的增多而增长。
3
Bromine Nonmetallic chemical element, chemical symbol Br, atomic number 35.