This invention relates to transition metal complexes represented by the formula: catalyst systems comprising the complexes, and polymerization methods for olefinic monomers using the catalyst systems. In said formula, M is a transition metal; E is NR2, CR3R4, O, S, or SiR5R6; Q is optional substitution; p is an integer ranging from 0 to 3; L is an optional neutral ligand; m is an integer ranging from 0 to 3; X is an anionic leaving group; n is 1 or 2, with m+n being 4 or less; J is a linker group contributing two or three atoms that are located within a first chelate ring; R1 and R1 are independently a hydrocarbyl group or a trihydrocarbylsilyl group; R2 is a hydrocarbyl group; R3 and R4 are independently H, a hydrocarbyl group, or a trihydrocarbylsilyl group; and R5 and R5 are independently a hydrocarbyl group.
这项发明涉及由以下公式表示的过渡
金属配合物:包括这些配合物的催化剂系统以及使用这些催化剂系统对烯烃单体进行聚合的方法。在上述公式中,M是过渡
金属;E是NR2、CR3R4、O、S或SiR5R6;Q是可选的取代基;p是一个范围从0到3的整数;L是一个可选的中性
配体;m是一个范围从0到3的整数;X是一个带负电的脱离基团;n为1或2,其中m+n为4或更少;J是一个连接基团,贡献两个或三个位于第一个螯合环内的原子;R1和R1独立地是一个烃基或三烃基
硅基;R2是一个烃基;R3和R4独立地是H、烃基或三烃基
硅基;R5和R5独立地是一个烃基。