Synthesis and Characterization of Pyridine Functionalized Imidazolium Salt and its Silver(I) N-heterocyclic Carbene Complex

Abstract

Reaction of imidazole with two equivalent of 2-picolyl chloride afforded bis (2-picolyl) imidazolium salts (1). Treatment of the synthesized imidazolium salt with silver(I) oxide resulted in the formation of bis NHC silver(I) complex (2). The compound was characterized spectroscopically (NMR, mass spectrometry), by elemental analysis and its molecular structure was analyzed using single crystal X-ray crystallographic analysis. The bis-N-heterocyclic carbene silver(I) complex synthesized shows approximately linear geometry around each of the silver atom of the type [Ag(NHC)₂]⁺. The metal to ligand ratio was found to be 1:2.

Keywords: Imidazolium salt, N-heterocyclic carbene, picolyl, silver