| 摘要: | The self-assembly of CoCl2‧6H2O with four diaminodiamide ligands that are 4,7-diazadecanediamide,
4,8-diazaundecanediamide, 4,7-dimethyl-4,7-diazadecanediamide and
N,N’-Bis(β-carbamoylethyl)1,2-diaminocyclohexane gave compounds
[(C8H18N4O2)Co(OH)2Co(C8H18N4O2)] ‧ 2Cl (1), [Co(C9H20N4O2)(Cl)(H2O)]Cl ‧ 2H2O (2),
[Co(C10H22N4O2)(H2O)]2Cl‧2H2O (3) and [Co(C12H24N4O2)(2H2O)]‧2Cl (4), respectively. Structures of 1, 2,
3 and 4 were characterized by single-crystal X-ray diffraction analysis. Structural data for 1 indicate that the
cobalt atom presents in a novel type of binuclear complex with distorted octahedral coordination geometry
around the cobalt atoms through hydroxo bridges, where one N- and one O-donor set of ligand and two OH
located at equatorial positions and one N- and one O-donor set of ligand occupied at axial positions. Structural
data for 2 indicate that the cobalt atom presents in a six-coordinated distorted octahedral geometry of
CoN2O3Cl core, where two N- and two O-donor sets of ligand located at equatorial positions and a chlorine,
a water molecule occupy the axial positions. Structural data for 3 indicate that the cobalt atom presents in a
six-coordinated distorted octahedral geometry of CoN2O4 core, where two N-donor set of ligand and two
water molecules sets located at equatorial positions and two O-donor set of ligand occupy the axial positions.
Structural data for 4 indicate that the cobalt atom presents in a six-coordinated distorted octahedral geometry
of CoN2O4 core, where two N- and two O-donor set of ligand located at equatorial positions and two water
molecules occupy the axial positions. Co(II) complexes using diaminodiamide ligands generate special
supramolecular architecture through intermolecular hydrogen-bonding interactions. |
