Structural correlations in nickel(II)–thiodiacetato complexes: molecular and crystal structures and properties of [Ni(tda)(H 2O) 3]

• Published in: Inorganic chemistry communications Vol. 7; no. 12; pp. 1277 - 1280
• Main Authors: Alarcón-Payer, C., Pivetta, T., Choquesillo-Lazarte, D., González-Pérez, J.M., Crisponi, G., Castiñeiras, A., Niclós-Gutiérrez, J.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2004
• Subjects: Chelate; Crystal structure; Ligand conformation; Nickel(II); Thiodiacetate; Thiodiglycolate; Ligand conformation; Nickel(II); Thiodiacetate; Thiodiglycolate; Chelate; Crystal structure
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2004.10.008

The compound triaqua(thiodiacetato)nickel(II) has been studied by thermal, spectral, magnetic and X-ray diffraction methods. As other four tda–Ni(II) derivatives reported in the literature, the molecule exhibits a Ni(II) octahedral coordination and tda plays a fac-SO 2 tridentate conformation. The structural significance of this compound as starting material to obtain mixed-ligand derivatives is discussed. 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 ¯ , in contrast to the related compound [Ni(tda)(H 2O) 3] · H 2O (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)(H 2O) 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.