Synthesis and structure of cobalt α-dioximate complexes with isonicotinamide.

Autor: Chiobenika, O., Bourosh, P., Lozan, V., Bologa, O., Bulkhak, I., Wicher, B., Simonov, Yu.
Zdroj: Russian Journal of Inorganic Chemistry; Jul2011, Vol. 56 Issue 7, p1050-1059, 10p
Abstrakt: New cobalt trans-dioximate complexes with isoniconinamide have been synthesized: [Co(DmgH)(Inia)] ( I), [Co(DmgH)(Inia)][PF] · 1.5HO ( II), [Co(NioxH) (Inia)][PF] · HO · CHOH ( III), and [CoIIICl(DmgH)(Inia)] · HO ( IV), where DmgH and NioxH are the dimeth-ylglyoxime and 1,2-cyclohexanedionedioxime monoanions, respectively; Inia is the isonicotinamide molecule. The structures of compounds I-IV have been determined by X-ray crystallography. In I-IV, Co(II) or Co(III) has an octahedral environment with the pseudomacrocyclic (DioxH) moiety (DioxH is the dioximate monoanion) in the equatorial plane. The latter is stabilized by O-H...O hydrogen bonds. The isonicotinamide molecules in all four complexes are monodentately bound to the metal ion through the heterocyclic nitrogen atom. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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