Novel iron tetranuclear complex and method for producing the same

摘要

PURPOSE:To obtain a new from tetranuclear complex useful for an improver for generating hydrogen in electrolysis of water, a reversible adsorbent for collecting an ion exchanger, a nitrogen oxide or a sulfur oxide, etc. CONSTITUTION:A compound of formula I (M and R each is a monofunctional or difunctional cation; A is a neutral or an anionic ligand of a hydroxy acid of nitrogen or sulfur; dpta is 1,3-diamino-2-hydroxypropanetetraacetic acid residue; X is a crystal solvent; (p), (q) and (r) each satisfy the formula mp+nq-ra=2, (m) is valence of a cation M, (n) is valence of a cation R, (a) is valence of the anionic ligand, (p) and (r) each is 1-6 and (q) is =4; (k) is =30) such as a compound of formula II. The compound of formula I, for example, is obtained by mixing a water-soluble ferric salt with 1,3-diamino-2-hydroxypropane- tetraacetic acid in an aqueous medium and reacting the mixture with a water-soluble salt containing a monovalent or divalent metal cation and an anionic ligand of a hydroxy acid of N, S, C or P.