| abstract |
A metal complex having excellent gas separation performance is provided. The following general formula (I) (Wherein R 1 , R 2 and R 3 are the same or different and each represents a hydrogen atom, an alkyl group or a halogen atom which may have a substituent, X represents a carbon atom or a nitrogen atom, and Y represents A hydrogen atom, an alkyl group optionally having a substituent, an aryl group, and the like, and when X is a nitrogen atom, Y does not exist.) A metal complex comprising at least one metal selected from metals belonging to the fourth to fifth periods of the group and an organic ligand capable of bidentate coordination with the metal. [Selection figure] None |