Studies of 8-Hydroxyquinoline Derivatives (Part I) Synthesis of 7-Nitroso-8-Hydroxyquinoline-5-Sulfonate and its Acid Dissociation Constants

8-Hydroxyquinoline 誘導體에 關한 硏究 (第 1 報) 7-Nitroso-8-Hydroxyquinoline-5-Sulfonate 의 合成과 그 酸解離定數

  • 이동형 ($金屬{\cdot}燃科綜合硏究室$)
  • Published : 19650300

Abstract

7-Nitro-8-hydoxyquinoline-5-sulfonate (NHQS) have been synthesized from 8-hydroxyquinoline-5-sulfonic acid by nitrosation in alkaline medium at temperature below $10^{\circ}C$ and the acid dissociation constants of NHQS have been determined by spectrophotometric and potentiometric methods. Almost same values are obtained by both methods but the values are lower than the corresponding 8-hydroxyquinoline. The lower basicity of NHQS is considered as the effect of electron withdrawing groups, especially adjacent nitroso group.

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References

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