| abstract |
The present invention provides a catalyst comprisingn (A) a tantalum compound, and (B) an organic metal compound, wherein the organic metal compound (B) comprises at least one group selected from the group consisting of the following (1) to (5):n (1) a branched or cycloalkyl-substituted primary alkyl group having 4 to 15 carbon atoms, (2) an aryl-substituted primary alkyl group having 7 to 15 carbon atoms, (3) a 3-alkenyl group having 4 to 15 carbon atoms, (4) a secondary alkyl group having 3 to 15 carbon atoms which may be substituted with an aryl group or a cyclic alkyl group having 3 to 15 carbon atoms, and (5) a secondary alkenyl group having 4 to 15 carbon atoms, the catalyst showing good olefin trimerizing activity. |