Bis[μ-1,4-bis(4,5-dihydro-1H-imidazol-2-yl)benzene-κ2N3:N3′]silver(I) dinitrate dihydrate

Abstract

The reaction of 1,4-bis(4,5-dihydro-1H-imidazol-2-yl)benzene (bib) with silver(I) nitrate in a 1:1 molar ratio generates the metallacyclic title complex, [Ag2(C12H14N4)2](NO3)2·2H2O, in which the bib ligand displays a cis configuration. Each bib ligand acts as a bidentate bridging ligand connecting a pair of AgI ions to form a [2 + 2] metallamacrocycle in which the Ag...Ag distance is 6.77 (2) Å. Each AgI ion has weak contacts (2.91 Å) with the nitrate anion. The uncoordinated water molecules make hydrogen bonds with nitrate O atoms, forming chains. The H atoms attached to the uncoordinated nitrogen interact with these chains through N—H...O hydrogen bonds, forming layers parallel to the (overline{1}11) plane.