In the title molecular salt, C(6)H(8)NO(+)·Cl(-), the packing is consolidated by N-H⋯Cl and O-H⋯Cl hydrogen bonds, resulting in the formation of [010] chains of alternating cations and anions.

In the title compound, {[Nd(NO(3))(C(6)H(5)NO(2))(2)(H(2)O)(3)](ClO(4))(2)·H(2)O}(n), the Nd(III) atom is nine-coordinated by four O atoms from four pyridinium-4-carboxyl-ate ligands, two O atoms from a chelating nitrate anion and three water mol-ecules in a distorted tricapped trigonal-prismatic coordination geometry. Adjacent Nd atoms are linked by the bidentate pyridinium-4-carboxyl-ate liga...

In the title compound, C(20)H(21)N(2)O(2)S(+)·NO(3) (-), the dihedral angle between the pyridinium and phenyl rings is 81.77 (19)°, that between the pyridinium and tolyl rings is 1.36 (18)°, and that between the phenyl and tolyl rings is 82.69 (19)°. In the crystal, the components are linked by strong charge-assisted bifurcated N(+)-H⋯(O,O) hydrogen bonds and the packing is consolidated by nume...