A research is based on a synthesis and characterization of quinaldic acid and some fluoridometalate compounds [hexafluoridosilicate(IV), hexafluoridotitanate(IV) and pentafluoridooxidovanadate(V)]. Three synthesis reactions between quinaldic acid and the corresponding oxide were carried out for each fluoridometalate in a stoichiometric ratio of 2:1, 1:1 and 0.5:1. All reactions were carried out in aqueous hydrofluoric acid solution. Reaction products were analysed by infrared spectroscopy, nuclear magnetic resonance spectroscopy, elemental analysis and X-ray structural analysis. Two unpublished novel compounds, namely 2-carboxyquinolinium fluoride and 2-carboxyquinolinium hexafluorotitanate, were described by the X-ray structural analysis.
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