Cyclo-Tetra-kis{?-N'-[(8-oxidoquinolin-7-yl)methyl-idene]isonicotino-hydrazidato}tetra-zinc tetra-hydrate.

ABSTRACT: In the title compound, [Zn(4)(C(16)H(10)N(4)O(2))(4)]·4H(2)O, the N'-[(8-oxidoquinolin-7-yl)methyl-idene]isonicotinohydrazidate (L(2-)) ligand binds to the metal ions, forming stable five- and six-membered chelate rings, leaving the pyridyl groups free. The compound is a tetra-nuclear Zn(II) complex centered about a fourfold roto-inversion axis, with the ligand coordinating in the doubly deprotonated form. The Zn(II) atom has a distorted square-pyramidal geometry being coordinated by one N and two O-atom donors from the doubly deprotonated L(2-) ligand, and by one N atom and one O-atom donor from a symmetry-related L(2-) ligand. In the crystal, four symmetry-related lattice water mol-ecules, centred about a fourfold roto-inversion axis, form a cyclic tetra-mer through O-H?O hydrogen bonds. These tetra-mers connect to the complex mol-ecules through O-H?N hydrogen bonds, forming a chain propagating along [100]. Neighbouring mol-ecules are linked by ?-? inter-actions [centroid-centroid distance = 3.660?(2)?Å] involving the quinolidine rings.

SUBMITTER: Wu XW 

PROVIDER: S-EPMC3379071 | biostudies-literature | 2012 Jun

REPOSITORIES: biostudies-literature