Organometallic compound

摘要

Organometallic cpds. of formula (I) are new. M = metal atom; L = a pi-ligand or other electron donor; T = a tin-contg. bridging gp.; Y = 1-20C hydrocarbyl, amido, alkoxy or halogen; k = 0 or 1. Also claimed are (i) catalyst components contg. (I) and cocatalysts; (ii) a process for the prodn. of (I) in which Y = NR<2>2 (with R<2> = H or 1-20C hydrocarbyl, e.g. 1-10C alkyl or 6-14C aryl), by reacting a cpd. of formula T(LH)k+1 (II) with a cpd. of formula M(NR<2>2)4 (III); (iii) a process for the prodn. of polyolefins by polymerisation of olefins in presence of a catalyst contg. (I) and a cocatalyst.