Abstract
By solving the inverse spectral problem for the (t-BuO)3Sb molecule, we have obtained force constants for the Sb(OC)3 fragments having the property of transferability. Rotation about the SbO bond weakly affects the frequencies of the skeletal vibrations of (RO)3Sb molecules (R=t-Bu, i-Pr), while rotations of the propyl radicals about the OC bond lead to significant changes in the frequencies. In an equilibrium mixture of conformers of (i-PrO)3Sb molecules, forms must be present with gauche orientation of the methine protons relative to the SbO bonds.
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