3,5-Dicarboxypyridinium fluoride

The cation of the title salt, C7H6NO4 +.F−, lies on a twofold rotation axis that passes through the N and 4-C atoms of the pyridine ring; the carb­oxy­lic acid substituent features unambiguous carbon–oxygen single and double bonds. The fluoride ion is a hydrogen-bond acceptor to two h...

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Bibliographic Details
Main Authors: Ng, Seik Weng, Tong, Yi-Ping
Format: Online
Language:English
Published: International Union of Crystallography 2011
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3151941/
Description
Summary:The cation of the title salt, C7H6NO4 +.F−, lies on a twofold rotation axis that passes through the N and 4-C atoms of the pyridine ring; the carb­oxy­lic acid substituent features unambiguous carbon–oxygen single and double bonds. The fluoride ion is a hydrogen-bond acceptor to two hy­droxy and one amino groups, these O—H⋯F and N—H⋯F hydrogen bonds leading to the formation of a layer structure parallel to the ab plane. The F atom lies on a position of 2 site symmetry.