Patent ID: 7732544

Claim:
A titanium compound produced from a reaction mixture of a partial hydrolysate of a titanium tetraalkoxide compound and an optically active ligand represented by the general formula (b), or a titanium oxoalkoxide compound represented by the general formula (a) and an optically active ligand represented by the general formula (b), [Ti x O y ](OR 1 ) 4x−2y (a) wherein, in the formula, R 1 is an alkyl group or an aryl group, each of which may have a substituent; x is an integer of not less than 2; y is an integer of not less than 1; and y/x satisfies 0.1<y/x≦1.5, wherein, in the formula, R 2 , R 3 and R 4 are independently a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aromatic heterocyclic group, an acyl group, an alkoxycarbonyl group or an aryloxycarbonyl group, each of which may have a substituent, two or more of R 2 , R 3 and R 4 may be linked together to form a ring, and the ring may have a substituent; and A* represents a hydrocarbon-containing group with three or more carbon atoms having an asymmetric carbon atom or axial asymmetry.