(E)-1-Methyl-4-[2-(2-naphthyl)vinyl]pyridinium iodideThis paper is dedicated to the late Her Royal Highness Princess Galyani Vadhana Krom Luang Naradhiwas Rajanagarindra for her patronage of Science in Thailand.

(E)-1-Methyl-4-[2-(2-naphthyl)vinyl]pyridinium iodideThis paper is dedicated to the late Her Royal Highness Princess Galyani Vadhana Krom Luang Naradhiwas Rajanagarindra for her patronage of Science in Thailand.

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In the title compound, C18H16N+·I−, the cation is disordered over read more two orientations related by a 180° rotation about its long axis with occupancies of 0.554 (7) and 0.446 (7).

Both disorder components exist in an E configuration.The dihedral angle between the pyridinium ring and the naphthalene ring system is 4.7 (6)° in the major disorder component and 1.

6 (8)° in the minor component.In the crystal structure, centrosymmetrically related cations blackmores ache relief focus review are stacked along the a axis, with significant π–π interactions between the pyridinium ring and the naphthalene ring system [centroid-centroid distance = 3.442 (9) Å].

The iodide ions are located between adjacent columns of cations.The cations are linked to the iodide ions by C—H.I interactions.

Weak C—H.π interactions involving the methyl group are also observed.