CATALYSTS Russian patent published in 2019 - IPC B01J31/18 B01J31/22 C08G64/34 C07F3/02 C07F3/06 C07F15/04 

FIELD: chemistry.

SUBSTANCE: present invention relates to polymerisation catalysts, specifically to a catalyst of formula (I):

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In formula (I) M₁ and M₂ are independently selected from Zn(II), Cr(II), Co(II), Cu(II), Mn(II), Ni(II), Mg(II), Fe(II), Ti(II), V(II), Cr(III)-X, Co(III)-X, Ni(III)-X, Mn(III)-X, Fe(III)-X, Ca(II), Ge(II), Al(III)-X, Ti(III)-X, V(III)-X, Ge(IV)-(X)₂ or Ti(IV)-(X)₂, value of radicals is given in the claim. E₃, E₄, E₅ and E₆, at least in one position differs from E₃, E₄, E₅ and E₆ in other positions. Invention also discloses a ligand of formula (II), a method of producing a ligand, a method of reacting carbon dioxide with epoxide, reacting epoxide and anhydride, reacting lactide and/or lactone in the presence of a catalyst of formula (I).

EFFECT: disclosed catalysts enable to obtain polymer products with high activity and selectivity.

50 cl, 3 tbl, 17 ex