DETERMINATION OF URANIUM(VI) AND THORIUM(IV) COMPLEXES OF 5-CHLORO-7-AMINO-8-HYDROXYQUINOLINE


UNAK P. , OZKAYALAR T., OZDEMIR D., YURT F.

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES, vol.196, no.2, pp.323-330, 1995 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 196 Issue: 2
  • Publication Date: 1995
  • Doi Number: 10.1007/bf02038051
  • Title of Journal : JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES
  • Page Numbers: pp.323-330

Abstract

5-Chloro-7-amino-8-hydroxyquinoline which is a 8-hydroxyquinoline derivative was synthesized and its thorium(IV) and uranium(Vr) complexes have been determined. 5-Chloro-7-nitro-8-hydroxyquinoline was prepared by nitration reaction of 5-chloro-8-hydroxyquinoline in aqueous solution of nitric acid. Then 5-chloro-7-amino-8-hydroxyquinoline was synthesized by reduction with sodium dithionite. Proton-ligand stability constants of 5-chloro-7-amino-8-hydroxyquinoline and stability constants of thorium(IV) and uranium(VI) complexes forming this ligand were determined by using the Irving-Rossotti method computing the Calvin-Bjerrum pH-titration data. As a result, thorium(IV) complexes were found more stable than uranium(VI) complexes.