作者:Salma Kiani、Richard J. Staples、Alan B. Packard
DOI:10.1107/s0108270102019911
日期:2002.12.15
The dimeric title copper(II) complex, diaqua-1kappaO,2kappaO-bis[3,9-dimethyl-6-(2-pyridylmethyl)-4,8-diazaundeca-3,8-di- ene-2,10-dione dioximato(1-)]-1kappa(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 (C17H24N5O2)(2)](ClO4)(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) Angstrom] 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.