Mono-and polynuclear CoII complexes with 2-hydroxy-6-methylpyridine |
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| Authors: | A. A. Sidorov M. E. Nikiforova E. V. Pakhmutova G. G. Aleksandrov V. N. Ikorskii V. M. Novotortsev I. L. Eremenko I. I. Moiseeva |
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| Affiliation: | (1) N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky prosp., 119991 Moscow, Russian Federation;(2) International Tomography Center, Siberian Branch of the Russian Academy of Sciences, 3a ul. Institutskaya, 630090 Novosibirsk, Russian Federation |
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| Abstract: | The reaction of 2-hydroxy-6-methylpyridine with Co(NO3)2·6H2O or Co(F3CSO3)2·6H2O in the absence of a deprotonating agent produces the mononuclear complexes Co(HL)4(NO3)2 or Co(HL)4(F3CSO3)2 (HL is 6-methyl-2-pyridone), respectively. In the presence of triethylamine, the reaction affords the trinuclear complex Co3(HL)2(L)4(NO3)2 or the heptanuclear dicationic complex [Co7L12]·(F3CSO3)2·4MeCN in the case of cobalt nitrate or cobalt trifluoromethanesulfonate, respectively. When HL is deficient, the replacement of the trimethylacetate anions in polymeric cobalt pivalate [Co(OH)n(OOCCMe3)2−n ]x gives rise to the hexanuclear complex Co6(μ3-OH)2(η2,μ3-L)2(μ-OOCCMe3)8(HOOCCMe3)4, whereas the HLCo6(μ3-OH)(η2,μ3-L)3(η2,μ-L) (μ3-L)(μ3-OOCCMe3)(μ-OOCCMe3)4(η2-OOCCMe3) complex is generated when HL is present in excess. The structures of the reaction products were established by X-ray diffraction. Dedicated to Academician O. M. Nefedov on the occasion of his 75th birthday. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 1851–1862, November, 2006. |
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| Keywords: | 2-hydroxy-6-methylpyridine cobalt complexes X-ray diffraction study |
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