Study, preparation and characterization of thiosemicarbazone ligands and their compounds

Abstract

Thiosemicarbazones are formed by the condensation of an aldehyde or ketone with a thiosemicarbazide. They have high coordinative capacity given that they have several potential donor atoms through which they can bind to transition metals. This coordinative capacity can be increased if the R1 and R2 substituents include additional donor atoms. In addition, thiosemicarbazones as well as their semicarbazones analogues have considerable biological and pharmacological interest because of their antibacterial, antiviral and antitumor activity [1-2]. This communication includes the preparation and characterization of a series of thiosemicarcarbazones and their applications in the synthesis of palladium organometallic compounds [3-4].

Preparation of novel complexes bearing diphosphine (dppm) derived from thiosemicarbazone palladacycles

“…The thiosemicarbazones were prepared by condensation reactions between a ketone and a thiosemicarbazide and obtained as described in the literature [6] (Scheme 1). The ligands a1-a3 were satisfactorily characterized by elemental analysis, IR, and 1 H-NMR.…”