Synthesis and X-Ray Structural Study of Magnesium (1,3-Propanediaminetetraacetato)nickelate(II) Octahydrate, Mg[Ni(1,3-pdta)]•H2O. Structural Parameters and Strain Analysis of [M(1,3-pdta)]n−Complexes in Relation to Their Octahedral Distortion
| Autor: | Divna M. Ristanovic, Dušan J. Radanović, Svetlana K Janićijević, Nenad S. Drašković, Hiroshi Kawaguchi, Tomoharu Ama |
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| Rok vydání: | 2001 |
| Předmět: | |
| Zdroj: | Bulletin of the Chemical Society of Japan. 74:701-706 |
| ISSN: | 1348-0634 0009-2673 |
| DOI: | 10.1246/bcsj.74.701 |
| Popis: | The hexadentate complex Mg[Ni(1,3-pdta)]•H2O (1,3-pdta = 1,3-propanediaminetetraacetate ion) was prepared and its structure established by X-ray crystallography. The complex salt crystallizes in the space group Pnna (# 52) of the orthorhombic crystal system with a = 13.251(2), b = 11.645(2), c = 13.818(3) A and Z = 4. The Ni(II) ion is surrounded octahedrally by two nitrogen and four oxygen atoms of the ligand. The Mg cation is bonded octahedrally to six water molecules. Both complex ions utilize a two-fold symmetry axis that is present in the crystal. The conformations of the chelate rings were found to be envelope or twist for the glycinates and skew-boat for the six-membered diamine ring. A comparison of structures of hexadentate [M(1,3-pdta)]n− complexes shows an expected variation in their octahedral distortion depending on the central metal ion M. Some spectral characteristics of the complex studied have also been reported. |
| Databáze: | OpenAIRE |
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