H. Buttrus, N.; A. Taqa, A.; M. Rumadthan, E.; Uekusa, H. Synthesis and Characterization of Mn+2, Co+2, Ni+2, Cu+2 and Zn+2 Complexes With Pyridinium Salt. Crystal Structure of 1,3, 5- Trimethylpyridinium Iodide. RSCI 2012, 23, 104-115.