The 7-sila norbornadienes (I–IV) react rapidly with halogens at −20 to +20°C to yield Me2SiHal2 (Hal = Cl, Br, I) and the naphthalene or benzene derivatives (V–VIII). Bromine in CCl4 at 0°C, however, caused surprising rearrangement in I giving the 2-bromosilylated naphthalene (IX), since an attack at the alkene group seemed to be preferred. Methylation and methoxylation of IX gave respectively X and
7-sila降
冰片二烯(I–IV)在-20至+ 20°C下与卤素迅速反应,生成Me 2 SiHal 2(Hal = Cl,Br,I)和
萘或苯衍
生物(V–VIII)。然而,在0°C的CCl 4中,
溴导致I产生令人惊讶的重排,生成2-
溴硅烷化的
萘(IX),因为似乎最好攻击烯烃基团。IX的甲基化和甲氧基化分别得到X和XI。IX的仔细
水解产生了二
硅氧烷VII。在160–200°C时未观察到将Me 2 Si插入SiHal,SiH,SiC或SnC键中,而通过一个单键平稳地插入了SnCl或SnH键中。步机制。卤素是从产生Me 2 SiHal的不同CHal键中提取的2有时是我4 Si 2 Hal 2。在这些情况下,亚甲
硅烷基前体的降解始终是一阶的,并且类似于自发热解的降解。