title: (E)-2-[4-(Dimethyl-amino)-styr-yl]-1-methyl-pyridinium 4-methyl-benzene-sulfonate monohydrate.
abstract: The cation of the title compound, C(16)H(19)N(2) (+)·C(7)H(7)O(3)S(-)·H(2)O, exists in the E configuration with respect to the C=C double bond and is essentially planar, the dihedral angle between the pyridinium and benzene rings being 3.55 (13)°. In the crystal, π-conjugated planes of cations and anions are inclined to each other at 84.30 (11)°. The crystal structure is stabilized by O-H⋯O hydrogen bonds and weak C-H⋯O inter-actions, which link the cations, anions and water mol-ecules into chains along the b axis. These chains are stacked along the a axis by π-π inter-actions with centroid-centroid distances of 3.6032 (16) and 3.6462 (16) Å.
authors: Suchada
authors: S
authors: Chantrapromma
authors: Kullapa
authors: K
authors: Chanawanno
authors: Hoong-Kun
authors: HK
authors: Fun
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