Patent ID: 8278303

Claim:
A phosphine transition metal complex represented by formula (1): wherein R 1 and R 2 , which are the same or different, each represent a group having 1 to 10 carbon atoms selected from a straight-chain or branched alkyl group, a cycloalkyl group, a substituted cycloalkyl group, an adamantyl group, a phenyl group, and a substituted phenyl group, wherein a substituent of the substituted cycloalkyl group or the substituted phenyl group as R 1 or R 2 is selected from the group consisting of alkyl, nitro, amino, hydroxy, fluoro, chloro, bromo or iodo; R 3 and R 4 taken together represent a benzene ring with or without a substituted group, wherein the substituted group is selected from the group consisting of a straight-chain alkyl group having 1 to 5 carbon atoms, a branched alkyl group having 1 to 5 carbon atoms, a nitro group, an amino group, a hydroxy group, a fluoro group, a chloro group, a bromo group, and an iodo group; M is gold; and X − represents an anion, wherein the anion is selected from the group consisting of chloride ion, bromide ion, iodide ion, tetrafluoroborate ion, hexafluorophosphate ion, and perchlorate ion.