| 摘要 |
chemical industry, more particularly production of polyolefin. SUBSTANCE: described are new ansa-zirconocenes of general formula IV: wherein r1 is H, CH3,C2H5, R2 is H; linear or branched alkyl, aryl and method of preparation thereof, by reacting indene lithium derivative with 1,1-dichloro- 2,5-dihydroxylol in diethyl ether and subsequently reacting semidilithium salt of bis-indenyl ligand with cyclosilane bridge with zirconium tetrachloride to prepare the desired product with high yield compounds of formula IV have high catalytic activity and stereoselectivity in polymerization reaction as mixture of rac(active) and medo(inactive) forms. EFFECT: improved properties of the title compounds. 6 cl, 1 ex, 2 tbl
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