Reactions of Cp2MCl2 (M=Ti or Zr) with Imine-Oxime Ligands. Formation of Metallacycles

• Main Authors: C. Tripathi, S. Sengupta, O. Pandey
• Format: Article
• Language: English
• Published: MDPI AG 2005-07-01
• Series: Molecules
• Subjects: Titanium(IV); zirconium(IV); imine-oxime; IR; PMR; antibacterial activity
• Online Access: http://www.mdpi.com/1420-3049/10/6/653/

The reactions of bis(cyclopentadienyl)titanium(IV)/zirconium(IV) dichloridewith a series of imine-oxime ligands (LH2), derived by condensing benzil-α-monoxime and2-phenylenediamine, 4-phenylenediamine, 4-methyl-2-phenylenediamine, 2,6-diamino-pyridine, have been studied in anhydrous tetrahydrofuran in the presence of base andmetallocycles of the [Cp2M(L)] (M=Ti or Zr) type have been isolated. Tentative structureshave been proposed for the products based on elemental analysis, electrical conductance andspectral (electronic, IR and 1H-NMR) data. Proton NMR spectra indicate that on the NMRtime scale there is rapid rotation of the cyclopentadienyl ring around the metal-ring axis at25oC. Studies were conducted to assess the growth inhibiting potential of the complexessynthesized and the ligands against various bacterial strains.