Synthesis, characterization and structural studies of diorganotin(IV) complexes with Schiff base ligand salicylaldehyde isonicotinylhydrazone

Synthesis and structural characterization of organotin(IV) compounds derived from the self-assembly of hydrazone Schiff base series and various alkyltin salts

“…In the 1 H NMR spectra of compounds 1-6, the single resonance for the proton of the -NHN@ group is absent at d = 3.7-3.9 ppm [12,14], thus indicating deprotonation of the -NHN@ group and confirming that all ligands coordinate to the Sn center in the enolic form. For all compounds, the spectra show that the chemical shifts of the protons on the aryl group have been assigned reasonably.…”

“…Schiff base ligands and di-o-chlorobenzylltin chloride were prepared by the methods reported in the literature [13,14,[32][33][34]. All the solvents used in the reaction were of AR grade and dried using standard literature procedures.…”

“…Recently, works in our laboratory have focused on the construction and crystallographic characterization of hydrazone Schiff base organotin(IV) compounds under ambient conditions [12][13][14][15][16][17]. It is well known that the biological activity of organotins is related to the type of alkyl groups attached to the tin atom.…”

The triphenyltin(VI) complexes of NSAIDs and derivatives. Synthesis, crystal structure and antiproliferative activity. Potent anticancer agents

“…170 ppm) was observed in all the spectra assigned to the carbon atom of the carboxylate group. The remaining resonances due to the aromatic carbon do not shift significantly on binding to Sn [7][8][9][10][11][12][13][14]28,29].…”

Heptacoordinate Tin(IV) Compounds Derived from Pyridine Schiff Bases: Synthesis, Characterization, in Vitro Cytotoxicity, Anti-inflammatory and Antioxidant Activity

“…21,22) The Schiff base-organotin complexes have received special attention in view of their chemistry and structural aspects of hypervalent species. [23][24][25][26][27][28][29][30] Regarding this, investigations concerning chelating properties and coordinative effects of 2,6-diacetylpyridine and its influence on the conformation and geometry of heptacoordinated tin complexes derived of hydrazones, 31,32) semicarbazones, thiosemicarbazones, [33][34][35][36][37][38][39][40] acylhydrazones, 41) have been undertaken. Our interest in organotin(IV) and organosilicon compounds containing pyridine moieties let us to study the influence and nature of the ligand substituents in the formation of pentacoordinate tin and silicon derivatives.…”