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KMID : 1059519950390120940
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Journal of the Korean Chemical Society
1995 Volume.39 No. 12 p.940 ~ p.945
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Synthesis and Characterization of trans-Dichlorocobalt(Ⅲ) Complex Containing N,N'-bis-[2(S)-pyrrolidinylmethyl]ethane-1,2-diamine
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Kim Dong-Yeub
Kim Nam-Jin
Son Byung-Sam
Lee Dong-Jin
Oh Chang-Eon
Doh Myung-Ki
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Abstract
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The SS-epm(N,N '-bis-[2(S)-pyrrolidinylmethyl]ethane-1,2-diamine) ligand having stereospecificity has been prepared and reacted with CoCl2·6H2O or trans-[Co(pyridine)4Cl2]Cl. The resultants are green crystals, both of which are identified to be trans-[Co(SS-epm)Cl2]2(COCl4) by elemental analysis and absorption spectra. CD spectrum of trans complex shows negative (-) cotton effect at long wavelength due to the vicinal effect of the stereospecifically chelated ligands. The conformation of SS-epm in trans complex is δλδ(SRRS) for each of the five membered chelated ring. Co(Ⅱ)Cl42- as counter ion plays an importance role in the ionic association of the formation of trans complex with SS-epm. Furthermore, according to orientation of secondary amine, total strain energy on each isomers was calculated by molecular mechanics (MM) to verify structural characterization and spectral data.
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KEYWORD
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