Self-assembly of two-dimensional coordination polymers from AgX (X = BF4-, ClO4-, NO3- and PF6-) and 2,6-dimethyl-3,5-dicyano-4-(6-methyl-2-pyridyl)-1,4-dihydropyridine

Novel supramolecules of Ag(I) complexes of the type [Ag(2-ddph)][X] (2-ddph = 2,6-dimethyl-3,5-dicyano-4-(6-methyl-2-pyridyl)-1,4-dihydropyridine; X = BF4-, 1, ClO4-, 2, NO3-, 3 and PF6-, 4) have been prepared by self-assembly of AgX with 2,6-dimethyl-3,5-dicyano-4-(6-methyl-2-pyridyl)-1,4-dihydropyridine (2-ddph) in MeOH-H2O. The elemental analyses and IR have been recorded and all the complexes have been structurally characterized by X-ray crystallography confirming that complexes 1-4 are two-dimensional coordination polymers. The anions BF4- and PF6- in complexes 1 and 4 are not coordinated to the Ag(I) atoms while the ClO4- and NO3- anions in 2 and 3 are coordinated to the metal centers through a monodentate oxygen atom. Complexes 1-3 show 2-D brick-wall structures, while complex 4 shows square grids.