Bis(saccharinato)palladium(II) and platinum(II) complexes with 2,2′-bipyridine: Syntheses, structures, spectroscopic, fluorescent and thermal properties

New palladium(II) and platinum(II) complexes, cis-[Pd(bpy)(sac)2] (1) and cis-[Pt(bpy)(sac)2] (2), where sac = saccharinate, bpy = 2,2′-bipyridine, have been synthesized and characterized by elemental analysis, UV–Vis, IR, 1H NMR and 13C NMR. The structures of the DMSO solvated complexes are determined by X-ray diffraction. Both complexes are isomorphous and the metal ions are coordinated by two N-bonded sac ligands, and two nitrogen atoms of pyridyl groups of bpy in a cis fashion. The mononuclear species interact each other through weak intermolecular C–H⋯O hydrogen bonds, C–H⋯π and π⋯π interactions leading to three-dimensional supramolecular networks. All complexes exhibit a high thermal stability in the solid state, and are fluorescent in the solution.

Graphical abstractcis-[Pd(bpy)(sac)2] (1) and cis-[Pt(bpy)(sac)2] (2), where sac = saccharinate, bpy = 2,2′-bipyridine have been synthesized and structurally characterized. Both complexes are isomorphous and the metal ions are coordinated by two N-bonded sac ligands, and two nitrogen atoms of pyridyl groups of bpy.Figure optionsDownload full-size imageDownload as PowerPoint slide