8 Sm Sn initiationCHCH-CHCH CH2CH-CHCH2+Sn m HtransterCHCH-CHCH- CH2CH2-CHCH2CHCH=CHCH2 Sa 2024/10/7 132024/10/7 13 S8 S + S - m n initiation CH2 CH=CHCH 2 C H2 CH CHCH2 S + m S - n H transfer CH2 CH=CHCH 2 C H2 C H2 CHCH2 S + m + CHCH=CHCH2 S8