Triaqua(thiodiacetato)nickel(II) has been synthesized and studied by X-ray crystallography, thermal, spectral and magnetic methods. The compound crystallizes in the triclinic system, space group P (1) over bar, in contrast to the related compound [Ni(tda) (H2O)(3)].H2O (orthorhombic) reported long time ago. As in other four Ni tda derivatives, the metal atom exhibits an octahedral coordination and tda ligand adopts a fac-tridentate chelating role. The studied compound is closely related to [Zn(tda)(H2O)(3)]. In addition, a structural comparison of the binary and ternary Ni-tda derivatives reveals that auxiliary N-donor ligands bind the metal atom using the trans-positions towards the Ni-O(carboxylato) bonds, but not in trans to the Ni-S(thioether) bond. (C) 2004 Elsevier B.V. All rights reserved.
Structural correlations in nickel(II)-thiodiacetato complexes: molecular and crystal structures and properties of [Ni(tda)(H2O)(3)]
PIVETTA, TIZIANA;CRISPONI, GUIDO;
2004-01-01
Abstract
Triaqua(thiodiacetato)nickel(II) has been synthesized and studied by X-ray crystallography, thermal, spectral and magnetic methods. The compound crystallizes in the triclinic system, space group P (1) over bar, in contrast to the related compound [Ni(tda) (H2O)(3)].H2O (orthorhombic) reported long time ago. As in other four Ni tda derivatives, the metal atom exhibits an octahedral coordination and tda ligand adopts a fac-tridentate chelating role. The studied compound is closely related to [Zn(tda)(H2O)(3)]. In addition, a structural comparison of the binary and ternary Ni-tda derivatives reveals that auxiliary N-donor ligands bind the metal atom using the trans-positions towards the Ni-O(carboxylato) bonds, but not in trans to the Ni-S(thioether) bond. (C) 2004 Elsevier B.V. All rights reserved.
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