| abstract |
PROBLEM TO BE SOLVED: To provide a metal complex having excellent gas separation performance. The following general formula (I): [Chemical 1] (Wherein R 1 , R 2 and R 3 are the same or different and each represents a hydrogen atom, an alkyl group which may have a substituent or a halogen atom) and a dicarboxylic acid compound (I) represented by At least one metal selected from chromium, molybdenum, tungsten, manganese, iron, ruthenium, cobalt, rhodium, nickel, palladium, copper, zinc and cadmium, and an organic ligand capable of bidentate coordination with the metal The above problem is solved by a metal complex consisting of [Selection figure] None |