title: Reactions of Cp2MCl2 (M=Ti or Zr) with imine-oxime ligands. Formation of metallacycles.
abstract: The reactions of bis(cyclopentadienyl)titanium(IV)/zirconium(IV) dichloride with a series of imine-oxime ligands (LH2), derived by condensing benzil-alpha-monoxime and 2-phenylenediamine, 4-phenylenediamine, 4-methyl-2-phenylenediamine, 2,6-diamino-pyridine, have been studied in anhydrous tetrahydrofuran in the presence of base and metallocycles of the [Cp2M(L)] (M=Ti or Zr) type have been isolated. Tentative structures have been proposed for the products based on elemental analysis, electrical conductance and spectral (electronic, IR and (1)H-NMR) data. Proton NMR spectra indicate that on the NMR time scale there is rapid rotation of the cyclopentadienyl ring around the metal-ring axis at 25 degrees C. Studies were conducted to assess the growth inhibiting potential of the complexes synthesized and the ligands against various bacterial strains.
authors.affiliation: Chemistry Department, D.D.U. Gorakhpur University, Gorakhpur - 273009, India. sengupta2002@yahoo.co.in
authors.forename: Om Prakash
authors.initials: OP
authors.lastname: Pandey
authors.forename: Soumitra Kumar
authors.initials: SK
authors.lastname: Sengupta
authors.forename: Chandra Mohan
authors.initials: CM
authors.lastname: Tripathi
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D003500:Cyclization; D007097:Imines / Q000737:chemistry*; D008024:Ligands; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D010091:Oximes / Q000737:chemistry*; D013057:Spectrum Analysis; D014025:Titanium / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry
chemical_list: D000900:Anti-Bacterial Agents; D007097:Imines; D008024:Ligands; D009942:Organometallic Compounds; D010091:Oximes; D015040:Zirconium; D014025:Titanium