FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing mono-imine compounds of formula 
where radicals assume values given in claim 1 of the invention, involving reaction of a dicarbonyl compound with aniline in an aliphatic non-aromatic solvent. The invention also describes an asymmetric iron complex of formula 
, where radicals assume values given in claim 3 of the invention, as well as a catalyst system for polymerisation of olefins.
EFFECT: invention describes mono-imine compounds having electron-attracting substitutes in the ortho-position and asymmetric bis(imino)-compounds and asymmetric iron compounds obtained from said compounds, and use of the complexes in olefin polymerisation.
7 cl, 11 ex, 1 tbl
