n27587SE Academic Article uri icon


  • The far-infrared and low-frequency Raman spectra of 1,3-disilacyclobutane and the far-infrared spectrum of 1,3-disilacyclobutane-1,1,3,3-d4 have been recorded and analyzed. The spectra consist of a large number of bands between 30 and 200 cm-1 which correspond to transitions involving the excited states of the ring-inversion vibration. The potential energy function for this vibration was determined from the transition frequencies, and it establishes the equilibrium conformation of the ring. In the ground state, the molecule is puckered with an average dihedral angle of 24. The barrier to inversion is 87 cm-1 (0.25 kcal/mol). A study of the isotopic shift in going from the d0 to the molecule demonstrates that the SiH2 in-phase rocking motion is coupled to the ring-inversion vibration. The syntheses of 1,3-disilacyclobutane, 1,3-disilabutane, and some related compounds are also described. 1977, American Chemical Society. All rights reserved.

published proceedings

  • Journal of the American Chemical Society

author list (cited authors)

  • Irwin, R. M., Cooke, J. M., & Laane, J.

publication date

  • January 1, 1977 11:11 AM