title: Microwave assisted synthesis, characterization and biological evaluation of palladium and platinum complexes with azomethines.
abstract: Reactions of 3-acetyl-2,5-dimethylthiophene with thiosemicarbazide and semicarbazide hydrochloride resulted in the formation of new heterocyclic ketimines, 3-acetyl-2,5-dimethylthiophene thiosemicarbazone (C(9)H(13)N(3)OS(2) or L(1)H) and 3-acetyl-2,5- dimethylthiophene semicarbazone (C(9)H(13)N(3)OS or L(2)H), respectively. The Pd(II) and Pt(II) complexes have been synthesized by mixing metal salts in 1:2 molar ratios with these ligands by using microwave as well as conventional heating method for comparison purposes. The authenticity of these ligands and their complexes has been established on the basis of elemental analysis, melting point determinations, molecular weight determinations, IR, (1)H NMR and UV spectral studies. These studies showed that the ligands coordinate to the metal atom in a monobasic bidentate manner and square planar environment around the metal atoms has been proposed to the complexes. Both the ligands and their complexes have been screened for their antimicrobial activities. The antiamoebic activity of both the ligands and their palladium compounds against the protozoan parasite Entamoeba histolytica has been tested.
authors: Department of Chemistry, University of Rajasthan, Jaipur 302004, India.
authors: Krishna
authors: K
authors: Sharma
authors: Ritu
authors: R
authors: Singh
authors: Nighat
authors: N
authors: Fahmi
authors: R V
authors: RV
authors: Singh
mesh_terms: D000890:Anti-Infective Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D001391:Azo Compounds / Q000737:chemistry* / Q000494:pharmacology; D004748:Entamoeba histolytica / Q000187:drug effects; D008024:Ligands; D008826:Microbial Sensitivity Tests; D008872:Microwaves; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry* / Q000494:pharmacology; D010984:Platinum / Q000737:chemistry* / Q000494:pharmacology; D012664:Semicarbazones / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D013057:Spectrum Analysis / Q000379:methods; D013882:Thiosemicarbazones / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000890:Anti-Infective Agents; D001391:Azo Compounds; D008024:Ligands; D012664:Semicarbazones; D013882:Thiosemicarbazones; C512188:azomethine; D010984:Platinum; D010165:Palladium