OXO-NITROGEN-CONTAINING LANTHANIDES COMPLEX, CATALYTIC SYSTEM CONTAINING SAID OXO-NITROGEN-CONTAINING COMPLEX, AND METHOD OF (CO)POLYMERIZATION OF CONJUGATED DIENES 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 an oxo-nitrogen-containing lanthanides complex with the general formula

.

The radicals values are the following: Ln is represented by neodymium, R₁ and R₂ are the same and are selected from linear or branched C₁-C₂₀ alkyl groups, R₃ is selected from optionally substituted aryl groups; or R₃ represents a ketimine group of the formula:

,

where R' and R" are identical and represent a hydrogen atom, Y represents an oxygen atom; or a -N-R₄ group wherein R₄ is selected from optionally substituted aryl groups, X₁, X₂ and X₃ are identical and represent a halogen atom such as, e.g., 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. Said bis (imino) pyridine complex of lanthanides with the general formula (I) can be used in the catalyst system.

EFFECT: possibility to obtain polymers of conjugated dienes with the high content of 1,4-cis units.

7 cl, 17 dwg, 2 tbl, 46 ex