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1980•Bulletin of the Chemical Society of JapanRequires access

Preparation of Polynuclear (Diamine)telluratocobalt(III) Complexes

Yutaka Hosokawa, Yoichi Shimura

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Abstract

Abstract Penta- and hexa-nuclear condensates of mono(diamine)cobalt(III) complexes and tellurates have been prepared and some of the optically active isomers separated. They are [{Co(TeO6H4)(diamine)}(Te2O10){Co(TeO6H4)(diamine)}]6− (brown complexes) and [{Co(TeO6H4)(diamine)}(TeO6){Co(TeO6H4)(diamine)}]4− (blue complexes), where diamine=ethylenediamine, (R)-(−)-propylenediamine, and (R,R)-(−)-1,2-cyclohexanediamine. The structures have been determined from the visible and ultraviolet absorption and circular dichroism spectra; the electrostatic repulsion between cobalt(III) and tellurium (VI) atoms is considered in detail.

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What this paper is about

Abstract Penta- and hexa-nuclear condensates of mono(diamine)cobalt(III) complexes and tellurates have been prepared and some of the optically active isomers separated. They are [{Co(TeO6H4)(diamine)}(Te2O10){Co(TeO6H4)(diamine)}]6− (brown complexes) and [{Co(TeO6H4)(diamine)}(TeO6){Co(TeO6H4)(diamine)}]4− (blue complexes), where diamine=ethylenediamine, (R)-(−)-propylenediamine, and (R,R)-(−)-1,2-cyclohexanediamine. The structures have been determined from the visible and ultraviolet absorption and circular dichroism spectra; the electrostatic repulsion between cobalt(III) and tellurium (VI) atoms is considered in detail.

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Available abstract

Abstract Penta- and hexa-nuclear condensates of mono(diamine)cobalt(III) complexes and tellurates have been prepared and some of the optically active isomers separated. They are [{Co(TeO6H4)(diamine)}(Te2O10){Co(TeO6H4)(diamine)}]6− (brown complexes) and [{Co(TeO6H4)(diamine)}(TeO6){Co(TeO6H4)(diamine)}]4− (blue complexes), where diamine=ethylenediamine, (R)-(−)-propylenediamine, and (R,R)-(−)-1,2-cyclohexanediamine. The structures have been determined from the visible and ultraviolet absorption and circular dichroism spectra; the electrostatic repulsion between cobalt(III) and tellurium (VI) atoms is considered in detail.

Key concepts: Chemistry, Diamine, Organic chemistry

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