Anion dependent formation of Ag(I) complexes of multidentate azine ligands: Synthesis and structural study

Abstract

The extended structures of Ag-complexes of the azine based ligands phenyl-2-pyridyl ketone azine ( L 1 ) and di-2-pyridyl ketone azine ( L 2 ) are reported, and focus is made on the investigation of the influence of the anion and supramolecular interactions on the self-assembly. Using AgNO 3, AgClO 4 and CF 3COOAg salts as starting materials for both ligands in acetonitrile, we observed the formation of the dinuclear complexes [Ag 2( L 1 ) 2](NO 3) 2 ( 1a), [Ag 2( L 1 ) 2](ClO 4) 2 ( 1b), from L 1 , the tetranuclear complexes [Ag 4( L 2 ) 2 (NO 3)(CH 3CN) 2](NO 3) 3 ( 2a), [Ag 4( L 2 ) 2(CF 3COO) 3CH 3CN](CF 3COO) ( 2b) and the linear chain polynuclear complex {[Ag 3( L 2 ) 2] (ClO 4) 3} n ( 3) from L 2 . The X-ray structures show that the molecular geometry depends on the choice of anion. The silver centers have distorted tetrahedral coordination geometry in all the complexes. Weak hydrogen bonding and other interactions result in 2-D and 3-D networks in these complexes.