title: Synthesis, characterization and biological study on Cr(3+), ZrO(2+), HfO(2+) and UO(2)(2+) complexes of oxalohydrazide and bis(3-hydroxyimino)butan-2-ylidene)-oxalohydrazide.
abstract: Cr(3+), ZrO(2+), HfO(2+) and UO(2)(2+) complexes of oxalohydrazide (H(2)L(1)) and oxalyl bis(diacetylmonoxime hydrazone) [its IUPAC name is oxalyl bis(3-hydroxyimino)butan-2-ylidene)oxalohydrazide] (H(4)L(2)) have been synthesized and characterized by partial elemental analysis, spectral (IR; electronic), thermal and magnetic measurements. [Cr(L(1))(H(2)O)(3)(Cl)].H(2)O, [ZrO(HL(1))(2)].C(2)H(5)OH, [UO(2)(L(1))(H(2)O)(2)] [ZrO(H(3)L(2))(Cl)](2).2H(2)O, [HfO(H(3)L(2))(Cl)](2).2H(2)O and [UO(2)(H(2)L(2))].2H(2)O have been suggested. H(2)L(1) behaves as a monobasic or dibasic bidentate ligand while H(4)L(2) acts as a tetrabasic octadentate with the two metal centers. The molecular modeling of the two ligands have been drawn and their molecular parameters were calculated. Examination of the DNA degradation of H(2)L(1) and H(4)L(2) as well as their complexes revealed that direct contact of [ZrO(H(3)L(2))(Cl)](2).2H(2)O or [HfO(H(3)L(2))(Cl)](2).2H(2)O degrading the DNA of Eukaryotic subject. The ligands and their metal complexes were tested against Gram's positive Bacillus thuringiensis (BT) and Gram's negative (Escherichia coli) bacteria. All compounds have small inhibitory effects.
authors.affiliation: Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Dakhalia 35516, Egypt. aelasmy@yahoo.com
authors.forename: A A
authors.initials: AA
authors.lastname: El-Asmy
authors.forename: O A
authors.initials: OA
authors.lastname: El-Gammal
authors.forename: H A
authors.initials: HA
authors.lastname: Radwan
mesh_terms: D000818:Animals; D002417:Cattle; D002857:Chromium / Q000737:chemistry*; D056831:Coordination Complexes / Q000138:chemical synthesis / Q000737:chemistry; D004247:DNA / Q000737:chemistry; D006195:Hafnium / Q000737:chemistry*; D006834:Hydrazines / Q000138:chemical synthesis / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D015394:Molecular Structure; D010087:Oxides / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D017974:Uranium Compounds / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D056831:Coordination Complexes; D006834:Hydrazines; D007477:Ions; D010087:Oxides; D017974:Uranium Compounds; D002857:Chromium; C545179:hafnium oxide; D004247:DNA; C427203:calf thymus DNA; D015040:Zirconium; C047385:uranium oxide; C028541:zirconium oxide; D006195:Hafnium