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KMID : 1059519860300010084
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Journal of the Korean Chemical Society
1986 Volume.30 No. 1 p.84 ~ p.89
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Cobalt(Ⅲ) Complex of Ethylenediamine-N,N'-di-α-Isobutyric Acid
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Jun Moo-Jin
Han Chang-Yoon
Park Chang-Woo
Choi Sung-Rack
Park Kwang-Ha
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Abstract
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A newflexible N2O2-type tetradentate ligand. Ethylenediamine-N,N'-di-α-isobutyric acid(eddib), has been synthesized, and dichloro cobalt(Ⅲ) complex of eddib has been prepared via the air-oxidation technique. Only S-cis isomer has been yielded during the preparation of complex. Ring strain and steric hinderance are cited as the cause for the preference for the S-cis geometric configuration. On series of cobalt(Ⅲ) complexes of eddib, [Co(eddib)L]n+ (L = Cl·(H2O), CO32-, (H2O)2) have been prepared in situ. In their electronic absorption spectra, the absorption maxima and their intensities of the above series of complexes are on the ordinary line of the spectrochemical and hyperchromic series. Elemental analysis, IR, NMR and electronic absorption spectra have been used to characterize the complex and geometries of the complex.
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KEYWORD
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