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Sadiq-ur-Rehman, Shahid, K., Ali, S., Bhatti, M. H. and Parvez, M. (2005) Organotin esterification of (E)-3-(3- fluoro-phenyl)-2-(4-chlorophenyl)-2-propenoic acid: Synthesis, spectroscopic characterization and in vitro biological activities. Crystal structure of [Ph3Sn(OC(O)C (4-ClC6H4) = CH(3-FC6H4))]. Journal of Organometallic Chemistry, 690, 1396-1408. doi:10.1016/j.jorganchem.2004.12.004

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• TITLE: Synthesis, spectral, 3D molecular modeling and antibacterial studies of dibutyltin (IV) Schiff base complexes derived from substituted isatin and amino acids

  AUTHORS: Har Lal Singh, Jangbhadur Singh

  KEYWORDS: Schiff Base; Isatins; Amino Acids; Dibutyltin (IV) Complexes; Spectral Studies; Antimicrobial Activity

  JOURNAL NAME: Natural Science, Vol.4 No.3, March 26, 2012

  ABSTRACT: New dibutyltin(IV) complexes of Schiff base derived from 5-chloroindoline-2,3-dione, indoline- 2,3-dione with amino acids (tryptophan, alanine and valine) were synthesized and characterized by elemental analysis, IR, electronic spectra, conductance measurements, and biological activity. The analytical data showed that the Schiff base ligand acts as bidentate towards metal ions via the azomethine nitrogen and carboxylate oxygen by a stoichiometric reaction of M:L (1:2) to form metal complexes. NMR (1H, 13C and 119Sn) spectral data of the ligands and metal complex agree with proposed structures. The conductivity values between 14 - 27 ohm-1cm2mol-1 in DMF imply the presence of non-electrolyte species. 3D molecular modeling and analysis of bond lengths and bond angles have also been conducted for a representative compound, [Bu2Sn(L2)2], to substantiate the proposed structures. Antibacterial results indicate that the metal complexes are more active than the free ligands.