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KMID : 1059519910350050493
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Journal of the Korean Chemical Society
1991 Volume.35 No. 5 p.493 ~ p.499
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Circular Dichroism Spectra on the Counter Ions and the Solvent Dependence of trans-[Co(R,R-chxn)2Cl2]+ Complex
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Oh Chang-Eon
Kim Yang
Park Sung-Yeul
Doh Myung-Ki
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Abstract
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The circular dichroism (CD) spectrum of trans-[Co(R,R-chxn)2Cl2]+ complex with different counter-ions have been measured in several organic solvents, where R,R-chxn is (1R,2R)-1,2-diaminocyclohexane. The observed variations in the CD spectrum of the complex exhibited remarkable solvent dependences. And it has been observed that the degree of the change of CD spectrum in the first absorption band region (1A2g) depends on the donor number (DN) of the solvents. From 1H NMR spectrum, it is interpreted that these variations in the CD spectrum of trans-[Co(R,R-chxn)2Cl2]+ complex are due to the favorable interaction between solvent molecules and the equatorial N-H protons of R,R-chxn ligands.
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