Trans-Bis(saccharinato)cadmium(II) Complexes with 2-Aminomethylpyridine and 2-Aminoethylpyridine - Synthesis, Crystal Structures, Spectral and Thermal Characterization of Trans- and Trans-[Cd(sac)2(aepy)2]

Abstract

Two trans-bis(saccharinato) (sac) complexes of cadmium(II) with 2-aminomethylpyridine (ampy) and 2-aminoethylpyridine (aepy) were synthesized and characterized by means of elemental analysis, FT-IR spectroscopy and thermal analysis. In addition, their solid-state structures were determined by single crystal X-ray diffraction studies. The [Cd(sac)<inf>2</inf>(ampy)<inf>2</inf>] (1) and [Cd(sac)<inf>2</inf>(aepy)] (2) complexes consist of neutral monomeric units and crystallize in the orthorhombic (Pbca) and monoclinic (P2 <inf>1</inf>/c) crystal systems, respectively. The cadmium(II) ions in 1 and 2 sit on inversion centres andexhibit distorted octahedral coordination by two sac anions and two aminopyridine ligands. The sac ligands in both complexes are N-coordinated and located in trans positions. while the ampy and aepy ligands act as a bidentate ligand forming two symmetrically chelate rings around cadmium(II). IR spectra and thermal decompositions of the complexes are also discussed.