Metal Complexes of EDTA and Its Related Compounds. I. Geometric Isomers of [Co(X)(<I>N</I>-methyl-trimethylenediamine-<I>N</I>,<I>N</I>′,<I>N</I>′-triacetate)] Complexes with X=H<SUB>2</SUB>O, NH<SUB>3</SUB>, Cl<SUP>−</SUP> or CN<SUP>−</SUP>

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概要

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• Two isomers of the complexes of the type, [Co(X)(<I>N</I>-Me-trdtra)] (<I>N</I>-Me-trdtra=<I>N</I>-methyl-trimethylenediamine-<I>N</I>,<I>N</I>′,<I>N</I>′-triacetate) have been isolated for each X=H<SUB>2</SUB>O, NH<SUB>3</SUB>, and Cl<SUP>−</SUP>. The structures have been assigned from their PMR and absorption spectra and from the results of kinetic studies. The isomers have equatorialskew and polar-chair structures and no indication of the formation of polar-skew isomer was observed. Isomerization reaction of the aqua complex in an aqueous solution indicated that the polar-chair isomer is more stable than the equatorial-skew isomer. Only the polar-chair isomer of H[Co(CN)(<I>N</I>-Me-trdtra)] has been obtained.

• 公益社団法人 日本化学会の論文

著者

• Doh Myung-Ki

  Department of Chemistry, Faculty of Science, Tohoku University, Aoba

関連論文

• Metal Complexes of EDTA and Its Related Compounds. I. Geometric Isomers of [Co(X)(N-methyl-trimethylenediamine-N,N′,N′-triacetate)] Complexes with X=H2O, NH3, Cl− or CN−

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