title: Di-μ(2)-methoxo-bis-{[μ-3,10,18,25-tetra-aza-penta-cyclo-[17.4.4.3.1.1]triconta-1(31),2,4(9),5,7,10,12,14,16(32),17,19(24),20,22,25,27,29-hexa-deca-ene-31,32-diolato]dizinc(II)} bis-(perchlorate) N,N-dimethyl-formamide disolvate.
abstract: The title compound, [Zn(4)(C(28)H(18)N(4)O(2))(2)(CH(3)O)(2)](ClO(4))(2)·2C(3)H(7)NO, is a C2 symmetric tetra-nuclear zinc(II) complex comprised of two [Zn(2)L](2+) units bridged by a pair of μ(2)-OMe ligands (where L is the doubly-deprotonated form of the macrocyclic dinucleating ligand derived from the [2 + 2] Schiff base condensation between 2-hy-droxy-benzene-1,3-dicarbaldehyde and 1,2-diamino-benzene). Each Zn(II) atom has a distorted square-pyramidal coordination geometry and the Zn(4)(μ-OMe)(2) unit lies in the cleft formed by two distinctly bent Schiff base ligands. The observed mol-ecular shape is supported by an intra-molecular π-π inter-action between one of the phenolate rings on each of the two ligands [centroid-centroid distance = 3.491 (5) Å]. The methyl groups of the solvent molecule are disordered over two sets of sites in a 0.6:0.4 ratio.
authors.forename: Zelong
authors.initials: Z
authors.lastname: Lim
authors.forename: Craig M
authors.initials: CM
authors.lastname: Forsyth
authors.forename: Bim
authors.initials: B
authors.lastname: Graham