Abstract
The asymmetric unit of the title compound, C7H3F4NO2, obtained as an intermediate in the synthesis of a coupling reagent, contains four independent and conformationally similar molecules. The amine H atoms form both intramolecular and intermolecular N—H⋯Ocarboxyl hydrogen bonds which, together with intermolecular O—H⋯Ocarboxyl hydrogen bonds and N—H⋯F associations form ribbon structures along the a axis.
Highlights
The asymmetric unit of the title compound, C7H3F4NO2, obtained as an intermediate in the synthesis of a coupling reagent, contains four independent and conformationally similar molecules
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: ZS2117)
The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry
Summary
Key indicators: single-crystal X-ray study; T = 295 K; mean (C–C) = 0.005 A; R factor = 0.057; wR factor = 0.177; data-to-parameter ratio = 9.0. The asymmetric unit of the title compound, C7H3F4NO2, obtained as an intermediate in the synthesis of a coupling reagent, contains four independent and conformationally similar molecules. The amine H atoms form both intramolecular and intermolecular N—HÁ Á ÁOcarboxyl hydrogen bonds which, together with intermolecular O—HÁ Á ÁOcarboxyl hydrogen bonds and N—HÁ Á ÁF associations form ribbon structures along the a axis. Related literature The title compound was obtained as one of the intermediates in the synthesis of a coupling reagent (Xu et al, 2008; Liao et al, 2007), using the Hofmann rearrangement (Perumal & Muthialu, 2004) with 2-carboxyl-3,4,5,6-tetrafluorobenzamide (Cai et al, 1992)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Acta Crystallographica Section E Structure Reports Online
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
