FIELD: chemistry.
SUBSTANCE: invention relates to a metal-ligand complex selected from compounds represented by following chemical formulas:
(WC03 precatalyst),
(WC04 precatalyst).
An ethylene-based catalytic composition for polymerization and a method for the production of ethylene-based polymer, using the specified complex, are also proposed.
EFFECT: proposed complexes provide polymerization even at a high temperature, do not reduce catalyst activity, and allow for production of copolymers with high molecular weight.
6 cl, 2 tbl, 15 ex
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