(E)-1-Methyl-4-[2-(1-naphthyl)vinyl]pyridinium 4-chlorobenzenesulfonate

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4-Methyl-N-[(E)-4-methyl-1-(4-methylphenylsulfonyl)-1,2-dihydropyridin-2-ylidene]benzenesulfonamide

The reaction of 2-(amino-meth-yl)pyridine and 4-toluene-sulfonyl chloride in CH(2)Cl(2) at pH 8 led to the title compound, C(20)H(20)N(2)O(4)S(2). The aromatic rings are almost perpendicular to each other and the dihedral angles between the aromatic ring planes are 74.33 (9) (central pyridine versus benzene ring of the tosyl group bonded to the imine functionality), 73.77 (6) (pyridine versus b...

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N′-[(E)-1-(4-Bromophenyl)ethylidene]-2-(2-methyl-4-nitro-1H-imidazol-1-yl)acetohydrazide

In the title compound, C(14)H(14)BrN(5)O(3), the mean plane of the imidazole ring (r.m.s deviation = 0.004 Å) forms a dihedral angle of 58.13 (7)° with the benzene ring. In the crystal, mol-ecules are linked via N-H⋯O, C-H⋯O and C-H⋯N hydrogen bonds into a three-dimensional network. A short Br⋯Br contact of 3.4932 (2) Å also occurs.

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(E)-1-Methyl-4-[2-(2-naphthyl)vinyl]pyridinium iodide1

In the title compound, C(18)H(16)N(+)·I(-), the cation is disordered over 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. ...

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(E)-1-Methyl-4-[2-(1-naphthyl)vinyl]pyridinium 4-bromobenzenesulfonate1

In the title compound, C(18)H(16)N(+)·C(6)H(4)BrO(3)S(-), the cation exists in the E configuration and the whole mol-ecule of the cation is disordered with a refined site-occupancy ratio of 0.733 (1):0.267 (1). The naphthalene system is not planar, the inter-planar angle between the two aromatic rings being 5.0 (5)° for the major component and 5.7 (10)° for the minor component. The cation is tw...

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