5-(4-Fluoro­phen­yl)-2H-pyrazol-1-ium 2,2,2-tri­fluoro­acetate

Yamuna, T. S. and Jasinski, Jerry P. and Kaur, Manpreet and Anderson, Brian J. and Yathirajan, H. S. (2014) 5-(4-Fluoro­phen­yl)-2H-pyrazol-1-ium 2,2,2-tri­fluoro­acetate. Acta Crystallographica Section E, 70 (4). o429-o430. ISSN 2056-9890

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Abstract

The title salt, C9H8FN2+·C2F3O2−, crystallizes with two independent cations (A and B) and two independent anions (C and D) in the asymmetric unit. In the cations, the dihedral angles between the benzene and pyrazolium rings are 23.7 (3)° in cation A and 1.8 (8)° in cation B. In the crystal, each anion links to the two cations via N—H⋯O hydrogen bonds, forming a U-shaped unit with an R44(14) ring motif. These U-shaped units stack along the a axis and are linked via C—H⋯O and C—H⋯F hydrogen bonds, forming slabs lying parallel to (100). Within the slabs there are π–π inter­actions between the pyrazolium rings [inter-centroid distance = 3.6326 (15) Å] and between the benzene rings [inter-centroid distance = 3.7244 (16) Å]. In the anions, the F atoms of the tri­fluoro­methyl groups are disordered over two sets of sites, with refined occupancy ratios of 0.58 (3):0.42, 0.540 (14):0.46 (14), and 0.55 (2):0.45 (2) for anion C, and 0.73 (5):0.27 (5), 0.63 (5):0.37 (5), and 0.57 (8):0.43 (8) for anion D.

Item Type:	Article
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	C Swapna Library Assistant
Date Deposited:	11 Nov 2019 05:17
Last Modified:	11 Nov 2019 05:17
URI:	http://eprints.uni-mysore.ac.in/id/eprint/9908

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