1.According to their vibrational spectra, antimony trialkoxides of formula Sb(OR)3with R=CH3, C2H5, n-C3H7, and i-C4H9are associated; no signs of association are observed for the compounds with R=i-C3H7and t-C4H9.2.The molecules of antimony tri-t-butoxide in the liquid state at 20°C exist in the form of rotational isomers having C1(Cs) and C3(C3v) symmetry, with the C1(Cs) conformer predominating. Upon freezing, the C3(C3v) conformer remains in the crystal