Two 3-amino-1H-pyrazol-2-ium salts containing organic anions, and an orthorhombic polymorph of 3-amino-1H-pyrazol-2-ium nitrate
Abstract
Co-crystallization from methanol of 3-amino-1H-pyrazole with 3,5-dinitro-benzoic acid produces 3-amino-1H-pyrazol-2-ium 3,5-dinitrobenzoate mono-hydrate, C3H6N3+.C7H3N2O6-center dot H2O, (I), while similar co-crystallization of this pyrazole with an equimolar quantity of fumaric acid produces bis(3-amino-1H-pyrazol- 2-ium) fumarate-fumaric acid (1/1), 2C(3)H(6)N(3)(+)center dot C4H2O42-center dot C4H4O4, (II). The reaction of 3-amino-1H-pyrazole with a dilute solution of nitric acid in methanol yields a second, orthorhombic polymorph of 3-amino-1H-pyrazol-2-ium nitrate, C3H6N3+center dot NO3-, (III). In each of (I)-(III), the bond distances in the cation provide evidence for extensive delocalization of the positive charge. In each of (I) and (II), an extensive series of O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds links the components into complex sheets, while in the structure of (III), the ions are linked by multiple N-H center dot center dot center dot O hydrogen bonds into a threedimensional arrangement. Comparisons are made with the structures of some related compounds.
Citation
Archana , S D , Kavitha , C N , Yathirajan , H S , Foro , S & Glidewell , C 2021 , ' Two 3-amino-1 H -pyrazol-2-ium salts containing organic anions, and an orthorhombic polymorph of 3-amino-1H-pyrazol-2-ium nitrate ' , Acta Crystallographica Section E Crystallographic Communications , vol. 77 , no. 1 , pp. 34-41 . https://doi.org/10.1107/S2056989020015959
Publication
Acta Crystallographica Section E Crystallographic Communications
Status
Peer reviewed
ISSN
2056-9890Type
Journal article
Rights
Copyright © 2020 The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Description
HSY thanks the University Grants Commission, New Delhi for the award of a BSR Faculty Fellowship for three years.Collections
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