BIS-IMINE PYRIDINE COMPLEX OF LANTHANIDES, CATALYTIC SYSTEM CONTAINING THIS BIS-IMINE PYRIDINE COMPLEX, AND THE METHOD FOR CONJUGATED DIENES (CO) POLYMERIZATION Russian patent published in 2017 - IPC C07F5/00 C08F4/52 C08F4/54 C08F136/06 C08F136/08 C08F136/00 C08F36/00 

FIELD: chemistry.

SUBSTANCE: invention relates to bis-imine pyridine lanthanide complex with the common formula (I):

,

wherein Ln is neodymium (Nd), R₁ and R₂ are identical and selected from linear or branched C_1-C₂₀ alkyl groups, R₃ and R₄ are identical or different and selected from optionally substituted cycloalkyl groups, optionally substituted aryl groups, X1, X2 and X₃ are identical and represent a halogen atom such as chlorine, bromine, iodine. A catalyst system for the (co)polymerization of conjugated dienes, a method (co) polymerization of conjugated dienes and a method for polymerization of 1,3-butadiene or isoprene are proposed as well. The bis-imine pyridine complex of lanthanides with the common formula (I) allows to obtain (co)polymers of conjugated dienes, including polybutadiene and polyisoprene with a high content of 1,4-cis units.

EFFECT: improved compounds.

7 cl, 12 dwg, 2 tbl, 42 ex