Formation of cobalt(iii) cations with semiquinonediimine ligands |
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| Authors: | Fomina I. G. Sidorov A. A. Aleksandrov G. G. Ikorskii V. N. Novotortsev V. M. Nefedov S. E. Eremenko I. L. |
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| Affiliation: | (1) Russian Academy of Sciences, N. S. Kurnakov Institute of General and Inorganic Chemistry, 31 Leninsky prosp., 119991 Moscow, Russian Federation;(2) Siberian Branch of the Russian Academy of Sciences, Institute of Inorganic Chemistry, 3 prosp. Akad. Lavrent"eva, 630090 Novosibirsk, Russian Federation |
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| Abstract: | The reactions of polynuclear cobalt(ii) trimethylacetates [Co(OH)n(OOCCMe3)2–n]x, Co6( 3-OH)2(OOCCMe3)10(HOOCCMe3)4, or Co4(3-OH)2(OOCCMe3)6(HOEt)6 with an excess of N-phenyl-o-phenylenediamine (1) in toluene followed by treatment with atmospheric oxygen afforded the diamagnetic complex [Co{ 2-(NPh)(NH)C6H4}2{1-(NH2)C6H4(NPhH)}]+(Me3CCOO...H...OOCCMe3)– (3), whose cation contains the CoIII atom. The reaction of Co4(3-OH)2(OOCCMe3)6(HOEt)6 with a deficient amount of diamine 1 in acetonitrile under an argon atmosphere gave rise to the antiferromagnetic ionic complex [Co{2-(NPh)(NH)C6H4}2MeCN]+[Co2(2,2-OOCCMe3)(2-OOCCMe3)2(2-OOCCMe3)2]–·2MeCN (4), whose cation is an isoelectronic analog of the cation in complex 3. The structures of the new compounds were established by X-ray diffraction analysis. |
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| Keywords: | N-phenyl-o-phenylenediamine cobalt(iii) trimethylacetate complexes semiquinonediimine oxidative dehydrogenation X-ray diffraction analysis |
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