New trinuclear Schiff base complexes, Co–M–Co (M=Mn, Co), as molecular precursors for mixed oxides
| Autor: | M. Carmen Torralba, M. Felisa Perpiñán, Angel Gutiérrez, M. Rosario Torres, Ana Sánchez |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Schiff base
Chemistry Thermal decomposition Inorganic chemistry chemistry.chemical_element Manganese Magnetic susceptibility Chloride Inorganic Chemistry Metal chemistry.chemical_compound Crystallography visual_art Materials Chemistry medicine visual_art.visual_art_medium Molecule Physical and Theoretical Chemistry Cobalt medicine.drug |
| Zdroj: | Polyhedron. 44:165-173 |
| ISSN: | 0277-5387 |
| DOI: | 10.1016/j.poly.2012.06.054 |
| Popis: | Three new trinuclear symmetric derivatives of formula [Co2M(μ-salenph)2(μ-X)2] (salenph: N,N′-phenylenebis(salicylideniminato); 1, M = Mn, X = CH3COO−; 2, M = Mn, X = Cl−; 3, M = Co, X = CH3COO−), have been obtained by solvothermal reaction between [Co(salenph)] and the corresponding cobalt(II) or manganese(II) salts in ethanol. The complexes have been characterized by X-ray crystallography and magnetic susceptibility measurements. Complexes 1 and 3 are isomorphous and they show the X ligands bridging in opposite sides of the molecule having a trans coordination to the middle metal atom. On the contrary, compound 2 shows an unusual cis coordination of the chloride groups around the central manganese atom. The potential of the new complexes to act as single-source molecular precursors for mixed oxides is considered. The thermal decomposition of the three complexes indicates that they are completely converted to the crystalline spinel like oxides, Co3O4 and Co2MnO4. Magnetic properties of the obtained oxides have been investigated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect