Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Dissociation Constants of Dibasic Carboxylic Acids in Methanol, N, N-Dimethylformamide and Acetonitrile

메탄올, N, N-Dimethylformamide 및 Acetonitrile 속에서 2염기성 카르복시산의 해리상수

  • Moon Su-Chan (Department of Chemistry, College of Liberal Arts and Sciences, Busan National University)
  • 문수찬 (부산대학교 문리과대학 화학과)
  • Published : 1972.12.30
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Abstract

The dissociation constants of dibasic carboxylic acids $(HOOC(CH_2)_nCOOH$, n = 0~4] in methanol, N, N-dimethylformamide and acetonitrile have been determined by the potentiometric method with a glass electrode. The difference between over-all dissociation constants in each other solvent is found to be of the same order of magnitude, and the $K_1/K_2$ ratios in aprotic dimethylformamide and acetonitrile are much greater than those in protic methanol and water.

메탄올, N, N-dimethylformamide 및 acetonitrile속에서 이염기성 카르복시산 $(HOOC(CH_2)_nCOOH$, n=0∼4)의 해리상수를 유리전극을 사용하여 전위차법으로 측정했다. 두 용매간에서 각 산의 전해리상수의 차는 거의 일정한 값이 되며, 이 값은 일염기성 카르복시산의 해리상수의 차와 거의 일치했다. 그리고 $K_1/K_2$의 값은 양성자성용매인 물과 메탄올에서보다 반양성자성용매인 N,N-dimethylformamide와 acetonitrile에서 훨씬 더 크다.

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