(2-Methylquinolin-8-olato)iron(III) and -copper(II) complexes

The crystal structures of tris(2-methylquinolin-8-olato-N,O)-iron(III), [Fe (C10H8NO)(3)], (I), and aquabis(2-methylquinolin(8)-olato-N,O)copper(II), [ Cu(C10H8NO)(2)(H2O)],(II), have been determined. Compound (I) has a distort ed octahedral configuration, in which the central Fe atom is coordinated by three N atoms and three O atoms from three 2-methylquinolin-8-olate ligand s. The three Fe-O bond distances are in the range 1.934 (2)-1.947 (2) Angst rom, while the three Fe-N bond distances range from 2.204 (2) to 2.405 (2) Angstrom. In compound (II), the central Cu II atom and H2O group lie on the crystallographic twofold axis and the coordination geometry of the Cu II a tom is close to trigonal bipyramidal, with the three O atoms in the basal p lane and the two N atoms in apical positions. The Cu-N bond length is 2.018 (5) Angstrom. The Cu-O bond length in the basal positions is 1.991 (4) Ang strom, while the Cu-O bond length in the apical position is 2.273 (6) Angst rom. There is an intermolecular OW-H . . . O hydrogen bond which links the molecules into a linear chain along the b axis.