Two novel self-interpenetrating 3D iron(II) coordination frameworks : synthesis, spectroscopic and structural characterizations with magnetic properties

Abstract

Two novel self-interpenetrating 3D Fe(II) coordination frameworks namely {Fe(4,4′-bpy)[Ag2(CN)3]2}n ( I ) and {Fe(4,4′-bpy)[Ag(CN)2]2[AgCN]2}n ( II ) have been synthesized and fully characterized. The 3D architectures and degree of interpenetration of these coordination frameworks were significantly affected by silver(I) cyanide species. The crystal structure of I presents 4-fold interpenetrating 3D framework with 4,4′-bpy and [Ag2(CN)3]− species. While, that of II constructed by 4,4′-bpy and two different silver(I) cyanide species, AgCN and [Ag(CN)2]− resulting to 2-fold interpenetrating 3D framework. The stability and rigidity of both coordination frameworks are mainly supported dominantly by AgI ⋯ AgI interactions. Their magnetic properties exhibit high spin behavior.