title: Crystal structure of {6,6'-dihy-droxy-2,2'-[imino-bis-(propane-1,3-diyl-nitrilo-methanylyl-idene)]diphenolato-κ(5) O (1),N,N',N'',O (1')}copper(II).
abstract: The title compound, [Cu(C20H23N3O4)], crystallizes in the space group Cc with two independent mol-ecules in the asymmetric unit. The Cu(II) atoms are each coordinated by the penta-dentate Schiff base ligand in a distorted trigonal bipyramidal N3O2 geometry. The equatorial plane is formed by the two phenolic O atoms and the amine N atom, while the axial positions are occupied by the two imine N atoms. In the crystal, the two independent mol-ecules are each connected into a column along the b axis through inter-molecular O-H⋯O hydrogen bonds. The two independent columns are further linked through an N-H⋯O hydrogen bond, forming a double-column structure.
authors.affiliation: Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, India.
authors.forename: Shabana
authors.initials: S
authors.lastname: Noor
authors.affiliation: Faculty of Pharmaceutical Science, Tokyo University of Science, Noda, Japan.
authors.forename: Sarvendra
authors.initials: S
authors.lastname: Kumar
authors.affiliation: Department of Chemistry, Aligarh Muslim University, Aligarh 202 002, India.
authors.forename: Suhail
authors.initials: S
authors.lastname: Sabir
authors.affiliation: Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz-1, 45470 Mülheim an der Ruhr, Germany.
authors.forename: Rüdiger W
authors.initials: RW
authors.lastname: Seidel
authors.affiliation: Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz-1, 45470 Mülheim an der Ruhr, Germany.
authors.forename: Richard
authors.initials: R
authors.lastname: Goddard
keywords: CuII complex; Schiff bases; crystal structure; distorted trigonal bipyramidal coordination geometry; hydrogen bond