Synthesis, crystal structure, and antimicrobial studies of trans-[Pd(PPh3)2(imidazolidine-2-thione)2]Cl2 • 3.5H2O

The palladium(II) complex, [Pd(PPh3)(2)(Imt)(2)]Cl-2 center dot 3.5H(2)O (I) (Imt = imidazolidine-2-thione), has been synthesized and characterized by IR, NMR, and X-ray crystallography. An upfield shift in the > C=S resonance of Imt in the C-13 NMR spectrum and a downfield shift in the N-H resonance in H-1 NMR are consistent with the sulfur coordination of Imt to palladium(II). In the crystal structure of I, the central palladium atom is coordinated to two thione sulfur atoms of Imt and to two phosphorus atoms possessing a square-planar environment with the average cis and trans bond angles of 89.60A degrees and 167.31A degrees, respectively. The title complex was screened for antimicrobial effects, and the results showed that it exhibits moderate activities against gram-negative bacteria (E. coli, P. aeruginosa). The complexes also exhibited significant activities against yeast (C. albicans, S. serevisaiae).