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'Cobalt' in keywords Facet   Publication Year 1993  [X]
Facet   section ZfN Section B  [X]
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1993[X]
1Author    RostislavD. Lampeka, Zam Ira, D. Uzakbergenova, VictorV. SkopenkoRequires cookie*
 Title    Spectroscopic and X-Ray Investigation of Cobalt(III) Complexes with 2-Oximinocarboxylic Acids  
 Abstract    Mixed complexes of Co(III) with 2-oximinopropionic (H 2A) or 2-oximino-3-phenylpropionic (H 2B) acid and different amine (imidazole, benzimidazole, pyridine, yS-picoline, y-picoline) are reported. Characterization of the complexes was based upon ele­ mental analysis, conductivity and JR, 'H N M R, and electronic absorption spectra, and X-ray diffraction analysis. The organic ligands behave as 0 ,N donors via the carboxyl oxygen and the oxime nitrogen atoms. A trans-octahedral structure has been assigned to the bis(2-oximino-carboxylato)bis(am ine)cobalt(III) on the basis of 'H N M R data. The crystal and molecular structures of the complexes rra«5-[bis(2-oximinopropionato)bis-(imidazole)]-(I) and ^ • a«5'-[bis(2-oximinopropionato)bis(pyridine)]cobalt(III) (II) were deter­ mined. I crystallizes in space group P 2/« with a = 14.167(2), b = 8.774(_1), c = 14.785(2)Ä, ß = 113.37(1)°, Z = 4, Dca)c = 1.568 g e m '3. II crystallizes in space group P 1 with a = 9.122(2), b = 10.038(2), c = 11.759(2) A, a = 69.95(1)°, ß = 67.47(2)°, y = 69.49(2)°, Z = 2, Dcalc = 1.547 g-cm~3. The structures were refined to unweighted R factors of 0.036 and 0.028, respec­ tively. The coordination sphere around Co is pseudo-octahedral with the 2-oxim inopropionato ligands occupying four equatorial positions, and the amines in axial po­ sitions. 
  Reference    Z. Naturforsch. 48b, 409—417 (1993); received November 2 1992 
  Published    1993 
  Keywords    Cobalt, Oximiocarboxylic Acid, Amine, X-Ray 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0409.pdf 
 Identifier    ZNB-1993-48b-0409 
 Volume    48