Silver(I) thiosemicarbazone complex [Ag(catsc)(PPh3)2]NO3: Synthesis, characterization, crystal structure, and antibacterial study

We report the synthesis, characterization and crystal structure of a new mononuclear silver(I) complex, [Ag(catsc)(PPh 3 ) 2 ]NO 3 (catsc = 3-phenylpropenalthiosemicarbazone). The complex was prepared by the reaction of catsc and AgNO 3 in the presence of PPh 3 and characterized by elemental analysis (CHN), FTIR, 1 H, 13 C and 31 P NMR spectroscopy, and single-crystal X-ray diffraction. In the complex, catsc acts as a bidentate NS ligand while the nitrate is a counter ion. The silver ion is coordinated by a bidentate ligand and two PPh 3 in the form of a distorted tetrahedron. In addition, the antibacterial effect of the complex was studied against the standard strains of two gram-positive ( Staphylococcus aureus and Enterococcus faecalis ) and two gram-negative ( Escherichia coli and Pseudomonas aeruginosa ) bacteria.