Crystal structure of di-?-acetato-di-acetatobis-(?-6,6'-dimeth-oxy-2,2'-{[(propane-1,3-diylbis(aza-nylyl-idene)]bis-(methanylyl-idene)}diphenolato)tetra-zinc.

ABSTRACT: The tetra-nuclear title complex, [Zn4(C19H20N2O4)2(CH3COO)4], is formed from two dinuclear motifs related by an inversion centre. The two crystallographically independent Zn(II) ions in the asymmetric unit are in different coordination environments. One is square-based pyramidal with one O atom of an acetate group occupying the axial position and two N and O atoms of one bmspd [H2bmspd = N,N'-bis-(3-meth-oxy-salicyl-idene)propyl-ene-1,3-di-amine] Schiff base ligand forming the basal plane. The other Zn(II) atom is six-coordinated by four O atoms of the bmspd ligand forming the equatoral plane and two O atoms of different acetate groups located in the axial positions. As a result, the two phenolic planes of the bicompartmental Schiff base ligand are distorted slightly. However, the planes of the two Schiff base ligands are parallel. In addition, the Zn-N and Zn-O bond lengths span the reasonable ranges 2.062?(2)-2.073?(2) and 1.9261?(15)-2.4356?(16)?Å, respectively. The Zn?Zn distances separated by phenolic O atoms are 3.2466?(4)?Å while the Zn?Zn distances bridged by acetate groups are 5.9835?(6)?Å. The tetra-nuclear moieties are connected by van der Waals interactions, and form a chain along c axis.

SUBMITTER: Cai X 

PROVIDER: S-EPMC4719841 | biostudies-other | 2015 Dec

REPOSITORIES: biostudies-other