Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Thermodynamics of Metal Chelate Formation of 8-Hydroxyquinoline-5-Sulfonic Acid

8-Hydroxyquinoline-5-Sulfonic Acid의 금속킬레이트 생성에 관한 열역학적 고찰

  • Kun Moo LEE (College of Education Seoul National University)
  • Published : 19690300
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Abstract

Acid dissociation constants and chelate stability constants of 8-hydroxyquinoline-5-sulfonic acid have been determined for divalent metal ions. Co (Ⅱ), Ni (Ⅱ) and Zn (Ⅱ) by means of the Calvin-Bjerrum technique at the various temperatures. The standard free energy changes for the reactions at $20^{\circ}$, $30^{\circ}$, $40^{\circ}$and $50^{\circ}C$ were calculated, and the corresponding values of ${\Delta}H^{\circ}$ and ${\Delta}S^{\circ}$ applying over this temperature range are reported. The results are interpreted on the basis of current theories of metal chelate formation in aqueous solution.

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