Synthesis, Characterization, and Crystal Structures of a Thiosemicarbazone Ligand and Its Silver(I) Complex

Thiosemicarbazone ligand 4Hbatsc = 4-hydroxybenzaldehyde-thiosemicarbazone and its silver(I) complex [Ag(PPh3)3(4Hbatsc)]NO3 were synthesized and characterized by elemental analysis (CHN), FT-IR spectroscopy, and single-crystal X-ray diffraction. The triclinic unit cell of 4H-ba-tsc (space group P-1) contains two independent molecules. Each of the two independent molecules is almost planar, with the sulfur atom (S1/S2) and the hydrazine nitrogen atom (N6/N4) in the E position concerning the C3-N5/C4-N4. The title complex is a triclinic P-1 mononuclear complex with the silver(I) ion coordinated in a distorted tetrahedral geometry by one S atom of 4H-ba-tsc and three P atoms of three PPh3. The complex involves the 4H-ba-tsc thiosemicarbazone ligand in an S monodentate binding mode. Besides, the thermal behavior of the complex was studied using thermogravimetry in order to evaluate its thermal stability and thermal decomposition pathway. Finally, nanoparticles of the complex were prepared in an ultrasonic bath.