Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2012 Vol: 4 Issue: 4

Dissociation constants of some pyrazole schiff bases in Dimethylformamide and Tetrahydrofuran

Abstract

The proton ligand dissociation constants of some Schiff bases of pyrazole aldehyde and the stability constants have been determined in DMF/THF-water (60:40 v/v) medium at 308.15 K. using Bjerrum-Calvin pH titration as extended by Irving and Rossotti. The stability constants are related to dissociation constants of these ligands, which depends on the substituents attached to the organic moiety.