Synthesis and crystal structure of a mononuclear iron(III) (η2-acetato) complex of a β-cis folded salen type ligand
作者:Jesús Sanmartı́n、Ana M. Garcı́a-Deibe、Matilde Fondo、Débora Navarro、Manuel R. Bermejo
DOI:10.1016/j.poly.2003.12.011
日期:2004.3
Fe(H2SB)(eta(2)-O2CMe) (.) MeCN [H4SB: N,N'-bis(5-hydroxysalicylidene)-1,4-diaminobutane] was synthesised via an electro-chemical procedure and its crystal structure was determined. The metal ion assumes a distorted octahedral coordination geometry that involves the two O-atoms of a chelating acetate and the N2O2 compartment of the bisdeprotonated diimine, which is asymmetrically folded in a beta-cis arrangement. Moderate hydrogen bonds between adjacent complex molecules, which also interact with lattice acetonitrile molecules, lead to a linear interaction, predominant in the crystal packing. (C) 2004 Elsevier Ltd. All rights reserved.
A di-μ-phenoxo bridged zinc dimer with unfamiliar spatial arrangement
作者:Jesùs Sanmartı́n Matalobos、Ana M. Garcı́a-Deibe、Matilde Fondo、Débora Navarro、Manuel R. Bermejo
DOI:10.1016/j.inoche.2003.11.030
日期:2004.2
A curious dimeric complex, Zn-2(H2SB)(2) . 3H(2)O . Me2CO [H4SB: N,N'-bis(2,5-dihydroxybencylidene)-1,4-diaminobutane], was synthesised by self-assembly reaction between H2SB2- and Zn2+ ions electrochemically generated. Interestingly, the zinc ions reside in chemically identical N2O3 coordination environments, but adopting two different geometries: trigonal bipyramidal and square based pyramidal. This peculiar molecule is non-centrosymmetric, but owns a pseudo twofold axis normal to the centre of the Zn2O2 metallacycle. This unfamiliar arrangement of the dimer leads to keep both tetra-methylene spacers at the same side of the plane formed by the metallacycle, resulting in a cavity where both zinc ions appear uncovered. (C) 2003 Elsevier B.V. All rights reserved.