Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Conformational Change of Optically Active [Co(acac)$_2$(diamine)]$^+$ Complexes in Some Organic Solvents

  • Kim, Yang (Department of Chemistry, Yeungnam University) ;
  • Oh Chang-Eon (Department of Chemistry, Yeungnam University)
  • Published : 1987.12.20
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Abstract

The circular dichroism(CD) spectra of the optically active [$Co(acac)_2(diamine)]^+$ complexes were measured in the several protic and aprotic solvents, where acac = acetylacetonate anion and diamine = ethylenediamine and trimethylenediamine. The degree of the CD variation in protic solvents was enhanced as the dielectric constant decreases except n-butanol and benzylalcohol. And the degree of the CD variation in aprotic solvents was roughly increased as both dipole moment and dielectric constant decrease except aromatic solvents and the solvents having no dipole moment. It was deduced that the CD variations of the complexes have been due to the conformational change of acetylacetonate ligands coordinated to Co(III) ion.

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