Abstract
The [Pb(Pin)(2)] center dot 3H(2)O, [M(Pin)(H2O)(2)(Cl)] center dot nH(2)O (M = SrII, CaII or BaII; n = 0-1), and [Fe(Pin)(2)(Cl)(H2O)] center dot H2O penicillin G potassium (Pin) complexes were synthesized and characterized using elemental analyses, molar conductivity, thermal analysis and electronic spectroscopy techniques. The positron annihilation lifetime (PAL) and Doppler broadening (DB) techniques have been employed to probe the defects and structural changes of Pin ligand and its complexes. The PAL and DB line-shape parameters were discussed in terms of the structure, molecular weight, ligand-metal molar ratio, and other properties of the Pin complexes.