2-Meth­oxy­carbonyl­pyridinium tetra­chlorido(pyridine-2-carboxyl­ato-κ2N,O)stannate(IV)

In the reaction of pyridine-2-carb­oxy­lic acid and stannic chloride in methanol, one equivalent of the carb­oxy­lic acid is protonated at the amino site and is also esterified, yielding the title salt, (C7H8NO2)[SnCl4(C6H4NO2)]. The SnIV atom in the anion is N,O-chelated by a pyridine-2-carboxyl­ate in a cis-SnNOCl4 octa­hedral geometry. The cation is linked to the anion by an N—H⋯O hydrogen bond.