Novel transition metal compound for use as a polymerization catalyst.

摘要

A transition metal compound of formula (I): wherein M is a transition metal of Group IVa, Group Va or Group VIa of the periodic table; each R<1>, which may be identical or different, is a hydrocarbon group of 2 to 6 carbon atoms; each R<2>, which may be identical or different, is an aryl group of 6 to 16 carbon atoms, which may be unsubstituted or substituted with a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms or an organosilyl group; X<1> and X<2>, which may be identical or different, are each a hydrogen atom, a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms, a halogenated hydrocarbon group of 1 to 20 carbon atoms, an oxygen-containing group or a sulfur-containing group; and Y is a divalent hydrocarbon group of 1 to 20 carbon atoms, a divalent halogenated hydrocarbon group of 1 to 20 carbon atoms, a divalent silicon-containing group, a divalent germanium-containing group, -O-, -CO-, -S-, -SO-, -SO2-, -NR<3>-, -P(R<3>)-, -P(O)(R<3>)-, -BR<3>- or -AlR<3>-, wherein R<3> is a hydrogen atom, a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms or a halogenated hydrocarbon group of 1 to 20 carbon atoms.