Zahra Bayat - Faculty of Chemistry, Bu-Ali-Sina University, Hamedan, Iran
Abed Yousefi, - Faculty of Chemistry, Bu-Ali-Sina University, Hamedan, Iran
Seyyed Javad Sabounchei - Faculty of Chemistry, Bu-Ali-Sina University, Hamedan, Iran

Pyridinium ylides are able to form stable complexes and could be characterizat with spectroscopic techniques. The present study describes the synthesis and characterization of mononuclear Ag(I) and polymeric Hg(II) complexes of pyridinium ylides The synthesis of complexes derived from ylides and Ag(I) began in 1975 by Yamamoto et al [1]. Herein, synthesis and characterization of α-ketostabilized pyridinium ylide of the type C5H5N=CHC(O)R with AgNO3 and Hg(NO3)2.H2O, using methanol as a solvent and study on their antibacterial properties are reported. All reactions were performed in air. Reaction of pyridinium ylides C5H5NCHC(O)C6H5 (m-Br) with Hg(NO3)2.H2O in 1:1 and with AgNO3 in 2:1 ratios leads to products of the type [Ag(ylide)2](NO3) and [Hg(NO3)2(ylide)]n complexes. Characterization of the obtained compounds was performed by elemental analysis, IR, 1H and 13C NMR. The spectroscopy analyzes and literature [2] were shown that the nitrate ion exists in the Polymer chain of Hg complex but in Ag complex, the nitrate ion shows a bonding interaction with the silver ion (Fig. 1). Also the results show that both complexes represent antibacterial activities.