In situ synthesis of dimeric distannoxane compounds using diorganotin bis(carboxylate) in basic solution.

[Display omitted] • NMR titration analysis of diorganotin bis(carboxylate) in basic solution. • Initial in situ analysis considering different base strengths. • In situ formation of distannoxanes via diorganotin bis(carboxylate). • First reaction mechanism for the formation process of distannoxanes. • Distannoxanes blocks for generating complexes with interesting applications. Twelve diorganotin bis(carboxylate) R 2 Sn(O 2 CR') 2 were synthesized using alkyl tin oxide (methyl, n -butyl, and n -octyl), and benzoic acid derivatives with para substituents (NH 2 , H, Cl, and NO 2). Comprehensive characterization through infrared (IR), mass spectrometry (MS), nuclear magnetic resonance (NMR), elemental analysis (EA), and X-ray diffraction confirmed their structures. The diorganotin bis(carboxylate) compounds were placed in situ in an NMR tube under basic conditions with deuterated chloroform as a solvent, forming dimeric distannoxane compounds ([R 2 Sn(O 2 CR')] 2 O) 2. Various bases, such as piperidine, piperazine, aniline, pyridine, sodium hydroxide, and tetrabutyl ammonium hydroxide, were employed. The integration of NMR, MS, and X-ray data provides crucial evidence for the formation of dimeric distannoxanes and their possible reaction mechanism under basic conditions. [ABSTRACT FROM AUTHOR]