Polynuclear Branched Tetrazole Systems. 2. New 2-(5-Tetrazolyl) ethylpodands and Their NH-Acidity

VY Zubarev, EV Bezklubnaya, AK Pyartman…

Index: Zubarev; Bezklubnaya; Pyartman; Trifonov; Ostrovskii Chemistry of Heterocyclic Compounds, 2003 , vol. 39, # 10 p. 1317 - 1325

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Abstract

Abstract Nine new polynuclear 2-(5-tetrazolyl) ethyl podands have been obtained by the azidation of the corresponding nitriles. Using Bjerrum distribution functions, the values of p K a 1, p K a 2, p K a 3, and p K a 4 have been determined by a potentiometric method for 14 polynuclear tetrazoles in aqueous and aqueous methanolic solution. The found values lie in the range from 3.5 to 7.5 pH units. The overall rules and the sequence of the ionization of ...