作者:Orde Q. Munro、Kate Gillham、Matthew P. Akerman
DOI:10.1107/s0108270109027735
日期:2009.8.15
The reaction of 0.67 molar equivalents of the O,N,O'-tridentate zwitterionic Schiff base (2Z, 4E)-4-[(2-hydroxyphenyl) iminio]pent-2-en-2-olate (H2L) with one equivalent of zinc(II) acetate in methanol affords a novel trinuclear Zn-II cluster, di-mu-acetato-1:2 kappa O-2:O';2:3 kappa O-2:O'-dimethanol-1 kappa O,3 kappa O-bismu-2-[(2E, 3Z)-4-oxidopent-3-en-2-ylideneamino]phenolato}-1: 2 kappa O-4(2),N,O-4:O-4;2:3 kappa O-4(4):O-2,N,O-4-trizinc(II), [Zn-3(C11H11NO2) 2(C2H3O2)(2)(CH4O)(2)], (I), in which two bridging acetate ligands link the terminal square-based pyramidal Zn-II ions to the approximately tetrahedral Zn-II ion at the core of the cluster. The ZnO4 coordination group of the central Zn-II ion is established by two bridging phenolate and two bridging acetate O atoms. The remaining four coordination sites of each terminal Zn-II ion are occupied by methanol and deprotonated H2L. Furthermore, the Zn-bound methanol hydroxyl groups are involved in complementary hydrogen bonding with the Zn-bound enolate O atom of a neighbouring molecule, about an inversion centre in each case. The structure of (I) is therefore best described as an extended one-dimensional hydrogen-bonded chain of trinuclear Zn-II clusters.