ArticleActa crystallographica. Section E, Crystallographic communications2016
Crystal structure of a one-dimensional looped-chain silver(I) coordination polymer: catena-poly[[silver(I)-bis-{μ-4-[1-(5'-isopropyl-[1,1':3',1''-terphen-yl]-2'-yl)-1H-imidazol-2-yl]pyridine-κ(2) N:N'}] nitrate methanol monosolvate monohydrate].
Article in Acta crystallographica. Section E, Crystallographic communications, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In the title compound, {[Ag(C29H25N3)2]NO3·CH3OH·H2O} n , the Ag(I) cation is four-coordinated by two pyridine N atoms and two imidazole N atoms from four individual 4-(1-(5'-isopropyl-[1,1':3',1''-terphen-yl]-2'-yl)-1H-imidazol-2-yl)pyridine (i-pro-pyim) ligands. This gives rise to a highly distorted tetra-hedral geometry with bond angles falling in the range 100.33 (19)-122.76 (19)°. Two crystallographically independent i-pro-pyim ligands (A and B) adopt very similar conformations to one another, such that the dihedral angles between the pyridyl and imidazolyl rings in the two ligands are 40.7 (3) and 42.2 (3)°, respectively. Each i-pro-pyim ligand binds two symmetry-related Ag(+) cations, leading to the formation of 14-membered cyclic dimers, in which the Ag(I) atoms are separated by 6.963 (2) Å for the Ag-A 2-Ag dimer and 7.020 (2) Å for Ag-B 2-Ag. These cyclic dimers are alternately connected to each other by sharing Ag(I) atoms, resulting in the formation of a looped-chain structure extending along the [100] direction. Moreover, adjacent looped chains are connected by inter-molecular π-π inter-actions [centroid-to-centroid distance = 3.689 (4) Å], giving rise to the formation of a two-dimensional supra-molecular network propagating parallel to (110). Several inter-molecular C-H⋯O and O-H⋯O hydrogen bonds further contribute to the stabilization of the crystal structure.
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