When 6- and 8-membered silazane rings are silylated after previous metalation with n-butyllithium isomerizations to cyclodisilazane structures take place by ring contraction. Structures of the various isomers are assigned by 1H-nmr.- and infrared spectra. The anionic rearrangements which were studied by proton nmr. spectroscopy and vapor-phase chromatography occur with catalytic amounts of base and
当六元和八元
硅氮烷环在先前用
正丁基锂异构化的
金属化后通过环收缩发生甲
硅烷基化时,会生成环二
硅氮烷结构。各种异构体的结构由1 H-核磁共振和红外光谱确定。质子核磁共振研究的阴离子重排。光谱法和气相色谱法是在催化量的碱作用下发生的,并在一级动力学后部分达到平衡。