Final Thoughts on Chemistry for 4′-(4-Methoxyphenyl)-2,2′:6′,2”-terpyridine

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Monoalkylated 4?-aryl-substituted terpyridines

1-Methyl-2-[4-phenyl-6-(pyridinium-2-yl)pyridm-2-yl]pyridinium diperchlorate, C22H19N3 2+¡¤2ClO4-, (I), and 2-[4-(methoxyphenyl) -2,2?-bipyridin-6-yl]-1-methylpyridinium iodide, C23H 20N3O+?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 pi-pi interactions, forming dimers in the crystal structure.

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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI