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Nickel(II) Complex with Optically Active (3S)-3-Hydroxyaminocaran-4-one E-oxime and Its Oxidation into a Complex with Nitroxyl Radicals |
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| Authors: | Larionov S V Myachina L I Tkachev A V Sheludyakova L A Boguslavskii E G |
| Institution: | (1) Siberian Division, Russian Academy of Sciences, Institute of Inorganic Chemistry, pr. Akademika Lavrent'eva 3, Novosibirsk, 630090, Russia;(2) Siberian Division, Russian Academy of Sciences, Novosibirsk Institute of Organic Chemistry, pr. Akademika Lavrent'eva 8, Novosibirsk, 630090, Russia |
| Abstract: | Ni(II) chelate with (3S)-3-hydroxyaminocaran-4-one E-oxime (H2L) of composition Ni(HL)2 · 2H2O was synthesized. The compound is diamagnetic, which suggests the square-planar structure of a NiN4 coordination unit. The electronic absorption spectroscopy and EPR methods were used to study its oxidative dehydrogenation in benzene resulting in a compound containing nitroxyl radicals Ni(HL·)2 and exhibiting strong antiferromagnetic exchange coupling of unpaired electrons of the radicals. An intermediate paramagnetic form Ni(HL)(HL·) was discovered by the EPR method. |
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