Role of metal center in reactions of polynuclear nickel(ii) and cobalt(ii) trimethylacetates with 8-amino-2,4-dimethylquinoline |
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| Authors: | Pakhmutova E V Malkov A E Mikhailova T B Fomina I G Sidorov A A Aleksandrov G G Golovaneva I F Novotortsev V M Ikorskii V N Nefedov S E Eremenko I L |
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| Institution: | (1) N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky prosp., 119991 Moscow, Russian Federation;(2) Institute of Inorganic Chemistry, Siberian Division of the Russian Academy of Sciences, 3 prosp. Akad. Lavrent"eva, 630090 Novosibirsk, Russian Federation |
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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( 4-OH)3(3-OH)3(n-OOCCMe3)12(HOOCCMe3)4 gave the mononuclear complex Ni( 2-L)(2-OOCCMe3)2 (2). The tetranuclear complex Ni4(3-OH)2(-OOCCMe3)4(2-OOCCMe3)2(EtOH)6 produced the mononuclear complex Ni(2-L)(2-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(3-OH)2(-OOCCMe3)4(2-OOCCMe3)2(EtOH)6, were transformed into the trinuclear cobalt(ii) complex Co3(3-OH)(-OOCCMe3)4(2-L)2(OOCCMe3) (4). Meanwhile, at 80 °C these compounds generated the binuclear cobalt(iii) complex Co2(22-(HN)C9NMe2)2(-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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| Keywords: | 8-amino-2 4-dimethylquinoline cobalt complexes nickel complexes X-ray diffraction analysis |
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