Vibrational spectra, theoretical calculations, and structures for 1,3-disilacyclopent-4-ene and 1,3-disilacyclopentane and their tetrachloro derivatives

The infrared and Raman spectra and theoretical calculations for 1,3-disilacyclopent-4-ene and 1,3-disilacyclopentane and their tetrachloro derivatives are reported. The calculated structures for the molecules have been found and the silicon–carbon bond where the carbon atom is olefinic was found to be shortened relative to SiH2CH2 bonds. The agreement between observed and calculated spectra is very good.