Patent ID: 8481735

Claim:
An organometallic compound of general formula (4): (wherein in general formula (4), Ar is a cyclopentadienyl group or an aromatic compound in which one or more hydrogen atoms may be substituted by a substituent W, and W denotes a saturated or unsaturated C1 -10 hydrocarbon group, an aryl group, a heterocyclyl group, an alkoxy group, a fluoroalkyl group, an acyl group, an ester group, a hydroxyl group, an amino group, an amide group, a carboxyl group, a sulfonyl group, a nitro group, a cyano group, a sulfenyl group, a sulfo group, a thiol group, a silyl group or a halogen group, M is ruthenium, rhodium, or iridium, X is a hydride group or an anionic group, each R 2 independently denotes a hydrogen atom, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a sulfo group, a thiol group, a carboxyl group or the following groups in which one or more hydrogen atoms may be substituted by a substituent W: a C1-10 alkyl group, a cycloalkyl group, an aryl group, a heterocyclyl group, an alkenyl group, an alkynyl group, an alkoxy group, an ester group, a fluoroalkyl group, an acyl group, a sulfonyl group, an amino group, an amide group, a sulfenyl group, or a silyl group, R 4 denotes a hydrogen atom, a C1-10 alkyl group, a cycloalkyl group, an aryl group, a heterocyclyl group, an alkenyl group, an alkynyl group, an ester group, an acyl group, a sulfinyl group, a sulfonyl group, or a silyl group, in which one or more hydrogen atoms may be substituted by a substituent W, 1 denotes an integer from 0 to 4, wherein one or more of carbon atoms, which is(are) not bonded to R 2 , in the pyridine ring structure may be replaced with a nitrogen atom, and wherein when 1 is 2 or more, 2 or more of R 2 may be linked to each other to form (a) ring(s)).