대한화학회지 (Journal of the Korean Chemical Society)

  • 제13권1호
  • /
  • Pages.5-8
  • /
  • 1969
  • /
  • 1017-2548(pISSN)
  • /
  • 2234-8530(eISSN)
대한화학회 (Korean Chemical Society)
권호 표지

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

Thermodynamics of Metal Chelate Formation of 8-Hydroxyquinoline-5-Sulfonic Acid

  • Kun Moo LEE (College of Education Seoul National University)
  • 발행 : 19690300
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초록

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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