Bis(2-amino-4-methyl­pyridinium) bis­(pyridine-2,6-dicarboxyl­ato)cuprate(II)

The asymmetric unit of the title compound, (C6H9N2)2[Cu(C7H3NO4)2], contains half of a [Cu(pydc)2]2− (pydcH2 is pyridine-2,6-dicarb­oxy­lic acid) anion and one protonated 2-amino-4-methyl­pyridine (2a4mpH)+ counter-ion. The anion is a six-coordinated complex with a distorted CuN2O4 octa­hedral geometry around the CuII ion. N—H⋯O and C—H⋯O hydrogen bonds along with π–π contacts between the pyridine rings of the (2a4mpH)+ cations [centroid–centroid distance = 3.573 (2) Å] stabilize the crystal structure

2-Amino-4-methyl­pyridinium 6-carb­oxy­pyridine-2-carboxyl­ate methanol monosolvate

In the title solvated molecular salt, C6H9N2 +·C7H4NO4 −·CH4O, the pyridine N atom of 2-amino-4-methyl­pyridine is protonated and one carboxyl group of pyridine-2,6-dicarb­oxy­lic acid is deprotonated. The dihedral angles between the –CO2 and –COH groups and the pyridine ring are 0.65 (13) and 7.4°. The crystal packing is stabilized by inter­molecular N—H⋯O, O—H⋯O and weak C—H⋯O hydrogen bonds