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KMID : 1059519860300060526
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Journal of the Korean Chemical Society
1986 Volume.30 No. 6 p.526 ~ p.531
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Complex Formation of 1,15-Diaza-3,4:12,13-dibenzo-5,8,11-trioxacycloheptadecane with Some Transition Metal Ions
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Chang Cheul-Gye
Shin Young-Kook
Kim Si-Joong
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Abstract
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The stability constants of 1,15-diaza-3,4:12,13-dibenzo-5,8,11-trioxacycloheptadecane (NenOdien H4, L) with transition metal ions such as Co2+, Ni2+, Cu2+, and Zn2+ have been determined by potentiometry in 95% methanol solution at 25℃. The complex formation of the NenOdien H4 with the transition metal ions depends on the basicity of the donor atoms. The order of complex stability was Co(Ⅱ) < Ni(Ⅱ) < Cu(Ⅱ) > Zn(Ⅱ). The geometries of the complexes in solid state were discussed by visible-near infrared and infrared spectrophotometry, elemental analysis and electro-conductivity. The results suggest that the geometries of the solid complexes are octahedral for [CoL2(OH2)Cl]Cl·2H2O, [NiL2(OH2)Cl]Cl·2H2O, and [ZnLCl2]·1/2H2O, and square pyramidal for [CuLCl]Cl, respectively.
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