1. New dodecanuclear phenylphosphonate-bridged Co(II) complexes
- Author
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Burkovskaya, Nataliya P., Nikiforova, Marina E., Kiskin, Mikhail A., Lermontov, Anatoliy S., Bogomyakov, Artem S., Mironov, Vladimir S., Dobrokhotova, Zhanna V., Pekhnyo, Vasyl I., Sidorov, Aleksei A., Novotortsev, Vladimir M., and Eremenko, Igor L.
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COMPLEX compounds synthesis , *METAL complexes , *COBALT , *X-ray diffraction , *LIGANDS (Chemistry) , *PHOSPHONATES , *MOLECULAR structure , *MAGNETIC properties of metals - Abstract
Abstract: New dodecanuclear phenylphosphonate-bridged Co(II) complexes [(μ2-THF)5(η-HPiv)Co12(μ3-OH)4(μ6-O3PPh)4(μ-Piv)12]·THF·2С6Н6 (1·THF·2С6Н6), [(μ2-THF)6Co12(μ3-OH)4(μ6-O3PPh)4(μ-Piv)12]·3THF (2·3THF) and [(μ2-Hmhp)6Co12(μ3-OH)4(μ6-O3PPh)4(μ-Piv)12]·6.5MeCN (3·6.5MeCN) have been synthesized by the reaction of the cobalt(II) pivalate polymer {Co(Piv)2} n (Piv is the pivalate anion), as a source of metal fragments containing cobalt(II) atoms, with potassium phenylphosphonate (K2PO3Ph) in the presence of neutral O-donor additional ligands like molecules of THF or 6-methyl-2-pyridone (Hmhp). The structures of the dodecanuclear complexes 1–3 were determined by using single-crystal X-ray diffraction data. The magnetic properties of the compounds showed that complexes 1 and 3 exhibit antiferromagnetic exchange interactions between the magnetic centers. The stability of compounds 1 and 3 were studied using thermogravimetric analysis. [Copyright &y& Elsevier]
- Published
- 2011
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