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Role of metal center in reactions of polynuclear nickel(ii) and cobalt(ii) trimethylacetates with 8-amino-2,4-dimethylquinoline

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Abstract

The reactions of 8-amino-2,4-dimethylquinoline (L) (1) with polynuclear nickel(ii) and cobalt(ii) hydroxotrimethylacetato complexes under anaerobic conditions were studied. The nonanuclear cluster Ni9(μ4-OH)3(μ3-OH)3(μn-OOCCMe3)12(HOOCCMe3)4 gave the mononuclear complex Ni(η2-L)(η2-OOCCMe3)2 (2). The tetranuclear complex Ni4(μ3-OH)2(μ-OOCCMe3)4(η2-OOCCMe3)2(EtOH)6 produced the mononuclear complex Ni(η2-L)(η2-OOCCMe3)(OOCCMe3)L (3). At room temperature, the cobalt-containing polynuclear trimethylacetates, viz., the polymer [Co(OH) n (OOCCMe3)2–n ] x and the tetranuclear complex Co4(μ3-OH)2(μ-OOCCMe3)4(η2-OOCCMe3)2(EtOH)6, were transformed into the trinuclear cobalt(ii) complex Co3(μ3-OH)(μ-OOCCMe3)4(η2-L)2(OOCCMe3) (4). Meanwhile, at 80 °C these compounds generated the binuclear cobalt(iii) complex Co2(μ2η2-(HN)C9NMe2)2(μ-OOCCMe3)(L)(OOCCMe3)3 (5). The structures of the resulting compounds were established by X-ray diffraction analysis. Compounds 2—4 exhibit the antiferromagnetic spin-spin exchange coupling, whereas compound 5 is diamagnetic.

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Authors and Affiliations

  1. N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky prosp., 119991, Moscow, Russian Federation

    E. V. Pakhmutova, A. E. Malkov, T. B. Mikhailova, I. G. Fomina, A. A. Sidorov, G. G. Aleksandrov, I. F. Golovaneva, V. M. Novotortsev, S. E. Nefedov & I. L. Eremenko

  2. Institute of Inorganic Chemistry, Siberian Division of the Russian Academy of Sciences, 3 prosp. Akad. Lavrent"eva, 630090, Novosibirsk, Russian Federation

    V. N. Ikorskii

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  1. E. V. Pakhmutova
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  2. A. E. Malkov
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  3. T. B. Mikhailova
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  4. I. G. Fomina
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  5. A. A. Sidorov
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  6. G. G. Aleksandrov
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  7. I. F. Golovaneva
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  8. V. M. Novotortsev
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  9. V. N. Ikorskii
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  10. S. E. Nefedov
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  11. I. L. Eremenko
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Pakhmutova, E.V., Malkov, A.E., Mikhailova, T.B. et al. Role of metal center in reactions of polynuclear nickel(ii) and cobalt(ii) trimethylacetates with 8-amino-2,4-dimethylquinoline. Russian Chemical Bulletin 52, 139–149 (2003). https://doi.org/10.1023/A:1022404617009

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