Preparation and Absorption Spectra of the Cobalt(III) Complexes of Amino Acids

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概要

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• Three different methods were investigated of the preparation of trisglycinato-, trisalaninato- and trisleucinatocobalt(III). The method using cobalt(III) hydroxide is convenient for the α-form, the method using hexammine-cobalt(III) salt is advantageous for the β-form, and the method using tricarbonatocobaltate(III) gives both forms of the complexes. In addition, two new isomers of [Co en(ata)]·H<SUB>2</SUB>O and [Co(NH<SUB>3</SUB>)<SUB>3</SUB>cit]·H<SUB>2</SUB>O having trans-cis and cis-cis configurations with respect to the coordinated atoms were synthesized.<BR>By comparing the visible and the ultraviolet absorption spectra, it was concluded that the α-form is a trans-cis isomer and that the β-form is a cis-cis isomer. Thermal decomposition of the complexes was performed in order to estimate the water of crystallization and the stability. The infrared spectra of the complexes were also measured.

• 社団法人 日本化学会の論文

著者

• Shibata Muraji

  Department of Chemistry Faculty of Science Kanazawa University

• Mori M.

  Department of Applied Physics, Faculty of Engineering, University

• Kyuno Eishin

  Department of Chemistry Faculty of Science Kanazawa University

• Kanaya Mitsuhiro

  Department of Chemistry Faculty of Science Kanazawa University

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