Dimerization of alpha,beta-unsubstituted 1-alkenes, having at least three carbon atoms, in the presence of a catalyst comprising (a) a titanium-containing component of the formula Cp.sub.2 TiXY, wherein Cp represents an optionally alkyl-substituted cyclopentadienyl group, X represents a halogen atom or an alkyl group, and Y represents a halogen atom, (b) an alkylaluminum halide, and (c) a nitrogen Lewis base, is characterized by high reaction selectivity to certain dimer products and little formation of higher polymers.
在至少具有三个碳原子的α,β-未取代1-烯烃存在下,使用催化剂(a)具有Cp.sub.2 TiXY式的
钛含量组分,其中Cp代表可选择的烷基取代的
环戊二烯基团,X代表卤素原子或烷基团,而Y代表卤素原子,(b)烷基铝卤化物,以及(c)一种氮路易斯碱的二聚化反应具有高反应选择性,能够形成特定的二聚体产物,并且几乎不形成更高的聚合物。