Journal
INORGANICA CHIMICA ACTA
Volume 357, Issue 5, Pages 1457-1464Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2003.11.015
Keywords
cadmium chloro complex; cadmium nitrato complex; coordination polymer
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We have carried out the synthesis of the cadmium coordination compounds [Cd(NO3)(2)(PyTT)(H2O)] (1) and [CdCl2 {(mu-Cl)(2)CdCl( mu-Cl)(2)(mu-PyTT)Cd}(2)](n) (2), together with their structural determination by means of X-ray diffraction. The compounds were also characterized through elemental analysis and infrared spectroscopy. The first complex presents a distorted pentagonal bipyramidal geometry with the axial positions occupied by one oxygen atom from a water molecule and a second one from a nitrate ion which acts as a monodentate ligand, whereas the equatorial plane contains three nitrogen atoms from the organic moiety and two oxygen atoms coming from the other nitrate group, which is bidentate. The structure of the second complex consists of parallel sheets linked by van der Waals forces, each one made up of structural units [CdCl2{(mu-Cl)(2)CdCl(mu-Cl)(mu-PyTT)Cd}(2)], which possesses two PyTT ligands, 10 bridging chloro ligands and 5 cadmium(II) centres belonging to three environment types: octahedral CdN2Cl4, octahedral CdCl6, on which a centre of symmetry is located, and tetrahedral CdNCl3. present in a 2:1:2 ratio. (C) 2003 Published by Elsevier B.V.
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