Reactivity of metal (ZnII, RuII)-2,2′-bipyridyl with some bifunctional ligands

Abstract

Complexation of cis-bis(2,2′-bipyridyl)dichlororuthenium(II) dihydrate with carboxaldehyde and carboxylate bearing ligand (4-carboxybenzaldehyde; L1H) and with bis-acetyl and pyridine containing ligand (2,6-diacetylpyridine; L2) yields [Ru(bpy) 3](PF6)2 (bpy = 2,2′-bipyridyl), as the major product in both reactions along with [Ru(bpy)2(L 1)]PF6 (1) and [Ru(bpy)2(L2)] (PF6)2(2) as minor products. However, reaction of cu-bis(2,2′-bipyridyl)dichlororuthenium(II) dihydrate with ligand containing bis-triazolo and diimino donor sites [1,4-bis(1,2,4-triazolo-3-imino) benzene; L3H2] provides [Ru(bpy)2Cl 2]PF6 (3) crystals characterized by its single crystal X-ray data along with some unidentified product. Similar to ruthenium bipyridyl, reaction of (2,2′-bipyridyl)dichlorozinc(II) monohydrate with L 2 has also been carried out which yields [Zn(bpy)3] (PF6)2 as a crystalline product along with a polymeric product with the composition [{Zn(bpy)(L2)Cl2} ·DMSO]n-.