In the crystal structure of the title salt, C(6)H(5)N(2) (+)·Cl(-), the pyridinium cation links to the Cl(-) anion via an N-H⋯Cl hydrogen bond. Weak C-H⋯Cl inter-actions also occur.

In the crystal structure of the title salt, C(8)H(12)NO(+)·Cl(-), the methoxy group of the cation is co-planar with the phenylene moiety with an r.m.s. deviation from the mean plane of only 0.005 Å. The ammonium N atom deviates from this plane by 1.403 (1) Å. In the crystal, the (4-meth-oxy-phen-yl)methan-aminium cations and chloride anions are linked by N-H⋯Cl and C-H⋯O hydrogen bonds, resulti...

In the crystal structure of the title compound, C(6)H(9)N(2)O(2)S(+)·Cl(-), the chloride anions are sandwiched between layers of 4-sulfonamido-anilinium anions. The components interact by way of N-H⋯Cl and N-H⋯O hydrogen bonds, building up a three-dimensional network.

In the cation of the title compound, C(8)H(11)N(2)O(+)·Cl(-)·H(2)O, the C-N bonds of the amidinium group are identical within experiemental error [1.305 (2) and 1.304 (2) Å], and its plane forms a dihedral angle of 25.83 (8)° with the phenyl ring. The ionic components are associated in the crystal into polymeric hydrogen-bonded supra-molecular tapes stabilized by N-H(+)⋯Cl(-) and N-H(+)⋯Ow inte...

In the title salt, C(7)H(8)NO(2) (+)·Cl(-), the cation and anion are linked by an O-H⋯Cl hydrogen bond. The three-dimensional crystal structure is stabilized by N-H⋯O and N-H⋯Cl hydrogen bonds.

The title compound, C(8)H(12)NO(+)·Cl(-), consists of an almost planar protonated 4-eth-oxy-anilinium cation with the N atom showing the biggest deviation from the plane formed by all non-H atoms of the cation [0.066 (1) Å]. In the crystal, N-H⋯Cl hydrogen bonds link cations and anions into chains along the a axis. Additional C-H⋯π and π-π inter-actions [centroid-centroid distance = 4.873 (2) Å...

In the title salt, C(6)H(8)N(3) (+)·Cl(-), each pyridine-carbox-imid-amidate cation is linked to two symmetry-related cations through N-H⋯N hydrogen bonds, and to two chloride ions by N-H⋯Cl hydrogen bonds. The N-H⋯N hydrogen bonds involve the pyridine N atom and one NH(2) group. In the crystal, N-H⋯N and N-H⋯Cl hydrogen bonds extend the structure into two-dimensional layers. Weak C-H⋯Cl inter-...

In the crystal of the title compound, C(8)H(10)NO(2) (+)·Cl(-), alternating layers of hydro-phobic and hydro-philic zones stack along the c axis. The chloride anions are sandwiched between the 4-(carboxy-meth-yl)anilinium layers, forming inter-molecular O-H⋯Cl and N-H⋯Cl hydrogen bonds with the ammonium and carboxyl groups of the cations. In addition, inter-molecular N-H⋯O and weak C-H⋯O and C-...

In the title compound, C(5)H(8)N(3) (+)·Cl(-), the cation and the anion lie on a mirror plane and are hydrogen bonded in a three-dimensional network via the H atoms of the two hydrazine N atoms. The pyridine N atom is protonated and hydrogen bonded to the terminal hydrazine N atom.