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The structures of four 2,6,8-trisubstituted imidazonaphthyridine derivatives, 6-methyl-2-(4-methylphenyl)-8-trifluoromethylimidazo[1,2-a][1,8]naphthyridine, (I), 2-(3,4-difluorophenyl)-6-methyl-8-trifluoromethylimidazo[1,2-a] [1,8]naphthyridine, (II), 2-(4-chlorophenyl)-6-methyl-8-trifluoromethylimidazo[1,2-a][1,8]naphthyridine, (III), and 2-(4-bromophenyl)-6-methyl-8-trifluoromethylimidazo[1,2-a][1,8]naphthyridine, (IV), are reported. The molecules are planar and exist as dimers, formed through intermolecular C—H
N hydrogen bonds in all four cases. The trifluoromethyl group undergoes rotational disorder in (II)–(IV). The molecules are laid in two-dimensional planes in the crystal lattice with possible intermoleculear π
π interactions.
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