Synthesis and characterization of diorganotin(IV) complexes of tridentate Schiff bases: Crystal structure of [N-(3-hydroxypyridine-2-yl)-5- chlorosalicylideneiminato]dimethyltin(IV)

Ancin N., Oeztas S. G., İDE S.

Structural Chemistry, vol.18, no.5, pp.667-675, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 18 Issue: 5
  • Publication Date: 2007
  • Doi Number: 10.1007/s11224-007-9199-1
  • Journal Name: Structural Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.667-675
  • Keywords: Diorganotin(IV) complexes, tridentate Schiff base, spectroscopic studies, crystal structure, pi-pi interaction, ORGANOTIN COMPOUNDS, SALICYLALDIMINE COMPLEXES, VIBRATIONAL FREQUENCIES, MOLECULAR-STRUCTURE, ANTITUMOR-ACTIVITY, PMR SPECTRA, DIMETHYLTIN(IV), DIHALIDE, LIGANDS, TIN(IV)
  • Ankara University Affiliated: Yes

Abstract

Some five-coordinated dimethyltin(IV) complexes of the type Me 2 SnL (where L is the anion of a bifunctional tridentate Schiff base) were synthesized. These Schiff bases are N-(3-hydroxypyridine-2-yl)-3- methoxysalicylideneimine, HOC 6 H 3 OCH 3 CH=NC 5 H 3 NOH (1), N-(3-hydroxypyridine-2-yl)-3- ethoxysalicylideneimine, HOC 6 H 3 OC 2 H 5 CH=NC 5 H 3 NOH (2), N-(3-hydroxypyridine-2-yl)-5- chlorosalicylideneimine, HOC 6 H 3 ClCH=NC 5 H 3 NOH (3), and N-(3-hydroxypyridine-2-yl)-3-methoxy-5- bromosalicylideneimine, HOC 6 H 2 OCH 3 BrCH=NC 5 H 3 NOH (4). Dimethyltin(IV) complex of 3 (3a) was characterized by single crystal X-ray diffraction method and a coordination geometry that is nearly halfway between trigonal-bipyramidal and square pyramidal arrangement was found. Dimethyltin complexes of (1), (2), and (4) were also prepared and characterized by the comparison of their elemental analysis and 1 H-NMR-, IR-, UV- and mass spectral data with those of (3a). For example, in the 1 H-NMR spectra, the 2 J( 119 Sn- 1 H) in the Sn-CH 3 moiety have values between 80 Hz and 90 Hz, typical of five-coordinated tin species. By using these values in Lockart's Equations, H 3 C-Sn-CH 3 angles in the complexes were estimated to lie between 130° and 145°. X-ray diffraction value for 3a, confirms this estimate within 3.4% relative deviation (129.7° exp. Vs. 134.9° estimate). © 2007 Springer Science+Business Media, LLC.