Patent ID: 7880025

Claim:
A ruthenium complex represented by the following formula (1): [RuX 2 (L 1 )] 2 (1) wherein X represents a halogen atom; L 1 represents an aromatic compound represented by the following formula (2): (wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently represent an alkyl group having 1 to 10 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, or a phenyl group which may be substituted with an alkyl group having 1 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms; R 7 and R 8 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms; and n1, n2 and n3 each represent 0 or 1).