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Spectral and acidity constants of some heterocyclic nitrogen Schiff bases |
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| Affiliation: | 1. USP - Department of Pharmacy, School of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, Brazil;2. UNIFESP - Department of Pharmaceutical Sciences, Universidade Federal de São Paulo, Diadema, Brazil;3. UNIFESP – Department of Chemistry, Universidade Federal de São Paulo, Diadema, Brazil;4. Therapeutics Research Centre, The University of Queensland School of Medicine, Brisbane, Australia;5. IPEN/CNEN - Energy Research Institute, São Paulo, Brazil |
| Abstract: | The spectral behaviour of some arylidene-2-aminopurines in pure and mixed organic solvents as well as in buffer solutions of varying pH have been studied. It is recognized that the hydroxy derivatives form an intermolecular hydrogen bond solvated molecular complex with DMF solution. The pK values of the purine compound and the aminopurine Schiff bases of some aromatic aldehydes have been determined and discussed. |
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