| Autor: |
Vladimir S. Mironov, Artem S. Bogomyakov, Grigory G. Aleksandrov, A. S. Lermontov, Ekaterina N. Zorina, Aleksei A. Sidorov, Mikhail A. Kiskin, Igor L. Eremenko, N. V. Zauzolkova, Vladimir M. Novotortsev |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Inorganica Chimica Acta. 396:108-118 |
| ISSN: |
0020-1693 |
| DOI: |
10.1016/j.ica.2012.10.016 |
| Popis: |
The reaction of potassium dimethylmalonate (K2Me2Mal) and cobalt(II) pivalate [Co(Piv)2]n under various conditions resulted in {[K2Co(H2O-κO)(μ-H2O)(μ6-Me2Mal)(μ5-Me2Mal)]·2H2O}n (1) and {[K6Co36(H2O-κO)22(μ-H2O)6(μ3-OH)20(μ4-HMe2Mal-κ2O,O′)2(μ6-Me2Mal-κ2O,O′)2(μ5-Me2Mal-κ2O,O′)8(μ4-Me2Mal-κ2O,O′)12(μ4-Me2Mal)6]·58H2O}n (2) (where Me2Mal2− is the dimethylmalonate dianion). Coordination polymers 1 and 2 were characterized by X-ray diffraction and magnetochemical studies. Analysis of the magnetic behavior indicates that 1 is characterized by an extremely high anisotropy of magnetic susceptibility and very weak spin coupling between CoII centers through malonate groups; compound 2 contains a highly symmetric, spherical-like Co36 metal core that exhibits low magnetic anisotropy and antiferromagnetic interactions between CoII centers. Theoretical aspects of anisotropic magnetic properties of orbitally-degenerate CoII ions in polynuclear cobalt(II) complexes are discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect