Infrared intensities and Coriolis interactions in methylene fluoride

摘要

The individual intensities of the Coriolis interacting ngr;9, ngr;3, and ngr;7bands of CH2F2molecule were separately obtained through computer simulation technique. A similar analysis was carried out for the ngr;8and ngr;2diad, and ngr;9, ngr;3, and ngr;7triad of CD2F2. The intensities of ngr;1and ngr;6bands of both CH2F2and CD2F2molecules were also reexamined. The obtained results were utilized to determine the sign of the dipole moment derivatives with respect to the normal coordinates. An evidence of a failure of the rsquo;rsquo;CH stretching criterionrsquo;rsquo; was found in the case of the antisymmetric CH stretching vibration of this molecule.