Associative organotin polymers. I. Symmetric trialkyltin fluorides: Synthesis and properties

Four novel symmetric tri-n-alkyltin fluorides were prepared. In this homologous series, melting point decreases with increase in the carbon chain length while an x-ray diffraction study shows an increase in amorphousness. ¹H-NMR spectra in cyclohexane, a nonpolar solvent in which these compounds form long polymeric chain, show a peak broadening effect due to high solution viscosity at very low solute concentration. Contrary to this, the spectra in CDCl₃, a polar solvent in which these compounds are monomeric, show well resolved and narrow peaks. IR frequencies for Sn? C vibrations have been assigned.