FIELD: petrochemical synthesis. SUBSTANCE: alkylation of olefin having at least 3 carbon atoms with isoalkane having at least 4 carbon atoms in presence of (i) Lewis acid-based complex catalyst is distinguished by that complex catalyst is product of reaction of at least Lewis acid with general formula R(m-2-z)MX(2+z) wherein M is 3a, 5a, or 5b group metal, X halide, R is C4-C12-hydrocarbyl, m integer equal to highest oxidation degree of M, Z is equal to 1, 2 or m-2; (ii) hydrogen halide; and (iii) organic compound with up to 12 carbon atoms. EFFECT: simplified process. 15 cl, 4 dwg, 2 tbl, 13 ex
