title: A lariat-functionalized copper(II) diimine-dioxime complex.
abstract: The dimeric title copper(II) complex, diaqua-1kappaO,2kappaO-bis[3,9-dimethyl-6-(2-pyridylmethyl)-4,8-diazaundeca-3,8-diene-2,10-dione dioximato(1-)]-1k(4)N(2),N(4),N(8),N(10);1:2kappa(5)O(2):N(2),N(4),N(8),N(10)-dicopper(II) diperchlorate, [Cu(2)(C(17)H(24)N(5)O(2))(2)](ClO(4))(2), crystallizes with one Cu atom in a square-pyramidal environment and the other Cu atom displaying a distorted octahedral coordination. In each case, the four N atoms in the core of the ligand (two imine and two oxime N atoms) form the base of the pyramid, with a water molecule at an apex. The two parts of the dimer are linked by an interaction [2.869 (2) A] between one of the Cu atoms and one of the oxime O atoms coordinated to the second Cu atom, and also by a hydrogen bond between the apical water molecule on the second Cu atom and the pyridyl N atom from the coordination sphere of the first Cu atom. The pyridyl N atoms of the lariat arms are not coordinated to either of the Cu atoms. Thus, this potentially pentadentate ligand is only tetradentate when coordinated to Cu(II).
authors.affiliation: Division of Nuclear Medicine, Children's Hospital/Harvard Medical School, Boston, MA 02115, USA.
authors.forename: Salma
authors.initials: S
authors.lastname: Kiani
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Staples
authors.forename: Alan B
authors.initials: AB
authors.lastname: Packard
mesh_terms: D003300:Copper / Q000737:chemistry*; D007097:Imines / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D010091:Oximes / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D007097:Imines; D010091:Oximes; D003300:Copper