Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Stability Constants of Dienbzo-18-Crown-6 Complexes with Alkaline Earth Metal Ions in Nonaqueous Solvents

물아닌 용매에서 Dibenzo-18-Crown-6 화합물과 알칼리토금속이온이 이루는 착물의 안정도상수

  • Si-Joong Kim (Department of Chemistry, Korea University) ;
  • Seok-Ro Koh (Department of Chemistry, Korea University) ;
  • Young-Kook Shin (Department of Chemistry, Chungbuk National University) ;
  • Yoon Chang-Ju (Department of Chemistry, Sung Sim College for women)
  • 김시중 (고려대학교 이과대학 화학과) ;
  • 고석노 (고려대학교 이과대학 화학과) ;
  • 신영국 (충북대학교 자연과학대학 화학과) ;
  • 윤창주 (성심여자대학 화학과)
  • Published : 1983.06.20
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Abstract

The stability constants for the complexes formed between dibenzo-18-crown-6 compound and alkaline earth metal cations in dimethylsulfoxide, dimethylformamide, and acetonitrile have been obtained by conductometry at $25{\circ}C\;and\;35{\circ}C$respectively. The stability constants were increased in order of $Ca^{2+} in any solvent, and the magnitudes were found to be reversely proportional to the solvent donicities. The result could be understood in terms of ion-cavity radius concept, solvent basicity, and solvation of the cations.

알칼리토금속이온과 dibenzo-18-crown-6이 디메틸술폭시드, 디메틸포름아미드, 아세토니트릴용매에서 이루는 착물의 안정도상수를 일정한 이온세기에서 $25{\circ}C$와 $35{\circ}C$에서 전기전도도법으로 각각 구하였다. 안정도상수의 순위는 모든 용매에서 $Ca^{2+}이었다. 그 크기는 용매의 염기도에 역으로 비례하였다. 이러한 결과를 이온-공동의 상대적 크기, 용매의 염기도 및 용매화 현상으로 설명하였다.

Keywords

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