FIELD: chemical technology. SUBSTANCE: invention relates to catalyst that is used for polymerization by Zigler method and containing organometallic compound and complex (transient metal-imidoaryl). Complex has at least one amido-group bound with transient metal being aryl-group in this complex is 0,0-disubstituted phenyl-group. Invention relates to also a method of olefin polymerization by Zigler method that involves olefin polymerization in the presence of above indicated catalyst. The use of the proposed catalyst provides high catalytic activity by yield for diarylamido-ligand as compared with dialkylamido-ligand or alkylarylamido-ligand. This increased activity of catalyst provides the corresponding and proportional decrease of transient metal concentration in the obtained polymer. EFFECT: enhanced effectiveness of catalyst, improved method of synthesis. 13 cl, 15 ex, 1 tbl
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