| Popis: |
The infrared spectra of gaseous (3500 to 450 cm −1 and solid (3500 to 50 cm −1 ) divinylfluoroborane, (C 2 H 3 ) 2 BF, and the Raman spectra (3500 to 20 cm −1 ) of the liquid and solid have been recorded. All of the normal modes have been assigned, based on band contours, depolarization values and group frequencies. From a comparison of the spectra in the fluid and solid states, it is concluded that the molecule exists in at least two conformations in the fluid phase but mainly as one conformer of C s symmetry in the solid state. The failure to obtain a “good” crystalline sample in the solid state is believed to be due to a very small enthalpy difference between the conformers. The results are compared to the corresponding quantities in several similar molecules. |
