Monoalkylated 4′-aryl-substituted terpyridines
1-Methyl-2-[4-phenyl-6-(pyridinium-2-yl)pyridin-2-yl]pyridinium diperchlorate, C22H19N32+·2ClO4−, (I), and 2-[4-(methoxyphenyl)-2,2′-bipyridin-6-yl]-1-methylpyridinium iodide, C23H20N3O+·I−, (II), both crystallize in the monoclinic space group P21/c. In contrast with the monocharged molecule of (II), the doubly charged molecule of (I) contains an additional protonated pyridine ring. One of the two perchlorate counter-anions of (I) interacts with the cation of (I) via an N—H…O hydrogen bond. In (II), two molecules related by a centre of symmetry are connected by weak – interactions, forming dimers in the crystal structure.
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Document Type: Research Article
Publication date: 2004-06-01