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Advances in heterocyclic chemistry, Ed. By A. R. Katrizky, Academic Press, Vol. 43, 1988, page 127.

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Article

pKaH of the Two Conjugate Acids (CH2N5+) and (HN6+) of Two Hypothetical Molecules the Pentazine (CHN5) and the Hexazine (N6) of Azabenzene Series: A Chemical Education Perspective

1Department of Chemistry, Geethanjali College of Engineering and Technology, Cheeryal-501301, Telangana, India

2Department of Chemistry, Osmania University, Hyderabad-500007, India


World Journal of Chemical Education. 2022, Vol. 10 No. 3, 105-109
DOI: 10.12691/wjce-10-3-3
Copyright © 2022 Science and Education Publishing

Cite this paper:
R. Sanjeev, R. Ravi, D. A. Padmavathi, V. Jagannadham. pKaH of the Two Conjugate Acids (CH2N5+) and (HN6+) of Two Hypothetical Molecules the Pentazine (CHN5) and the Hexazine (N6) of Azabenzene Series: A Chemical Education Perspective. World Journal of Chemical Education. 2022; 10(3):105-109. doi: 10.12691/wjce-10-3-3.

Correspondence to: V.  Jagannadham, Department of Chemistry, Osmania University, Hyderabad-500007, India. Email: jagannadham1950@yahoo.com

Abstract

Extrapolation of a simple straight-line graph is used to calculate the pKaH of two cations (CH2N5+) and (HN6+) (eqn. 1 and 2) of two hypothetical molecules pentazine (CHN5) and hexazine (N6). This is achieved by simply an extrapolation of the locus of the plot of pKaH of protonated pyridine, pyridazines, s-triazine and 1,2,4,5-tetrazine versus the number of nitrogen atoms of the cyclic azines. Even well matched pKaH values for these two species were found from the extrapolation of the locus of the plot of pKaH versus average ionization potential (Iv/eV) of the neutral azines. This article is useful in graduate research classroom to explain the acid-base properties and to determine the pKaH values.

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