Collect. Czech. Chem. Commun. 1988, 53, 987-994

Complexes of N-methyliminobis(methylenephosphonic) acid with cobalt, nickel, copper, and zinc

Ivan Lukeš, Zdeněk Kváča and Ivor Dominák

Department of Inorganic Chemistry, Charles University, 128 40 Prague 2


The 1 : 1 cobalt, nickel, copper and zinc complexes of N-methyliminobis(methylenephosphonic) acid, and 1 : 2 cobalt and nickel complexes were prepared. The effect of alkali and alkali earth metals as "external cations" on the crystallization and stoichiometry of solid cobalt complex was investigated. Infrared and electronic spectra and magnetic susceptibilities indicate that cobalt and nickel form high-spin complexes. The coordination sphere of the central atom is formed by a distorted octahedron of the ligand oxygen atoms.