A Two-Dimensional Manganese(II) Carboxylato Polymer. Structure, Magnetism, and EPR Study
| Autor: | Dimitris P. Kessissoglou, Vasilis Tangoulis, Catherine Dendrinou-Samara, Catherine P. Raptopoulou, and Aris Terzis, George Psomas |
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| Rok vydání: | 1996 |
| Předmět: |
Chemistry
Inorganic chemistry chemistry.chemical_element Crystal structure Manganese Magnetic susceptibility law.invention Inorganic Chemistry chemistry.chemical_compound Crystallography Octahedron law Antiferromagnetism Orthorhombic crystal system Carboxylate Physical and Theoretical Chemistry Electron paramagnetic resonance |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/ic9608051 |
| Popis: | The synthesis, crystal structure, and properties of [MnII(MCPA)2(H2O)2]n (MCPA = 2-methyl-4-chlorophenoxyacetic acid), 1, a 2-D manganese carboxylato polymer is reported. The synthesis of 1 has been achieved via the reaction of MCPA with MnCl2·2H2O and NaHCO3 in methanol. Crystal structure data: [C18H20Cl2O8Mn]; orthorhombic; space group Pbca; a = 7.811(6) A; b = 34.67(3) A; c = 7.481(6) A; Z = 4. The compound has a two-dimensional structure with Mn2+ atoms in an octahedral environment and mixed water/carboxylate coordination. The metal atoms are segregated in planes which are perpendicular to the b axis and are spaced 17.73 A apart. Variable-temperature magnetic susceptibility measurements indicate the presence of antiferromagnetic behavior. The EPR spectra of polycrystalline samples at 4 K show that the intensity of the signal decreases significantly with decreasing temperature and below ∼4 K becomes EPR silent. |
| Databáze: | OpenAIRE |
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