Local mode treatment of normal mode molecules: Application to CF2Cl2 overtone spectra

✍ Scribed by Dale E. Brabham; David S. Perry

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 411 KB
• Volume: 103
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(84)85283-5

✦ Synopsis

The C-F stretching fundamental and overtone spectra are reported for CFICll for up to fiie vibrational quanta A three-parameter local mode model accounts for both the frequencies and the relative intensities and provides a detailed description of the intramolecular dynamics following the excitation of a localized C-F stretch. * Permanent address: Elmira College, EJmira, New York 14601, USA. ** Using the formalism of ref. 141, the onset of local mode behavior may be predicted to occur at the 16thvibrational level for the C-F stretch. curate only up to the second overtone [lo] because of the large interbond coupling ofopposite S-F bonds. Considerable effort has been devoted to the measurement [ II-161 and analysis [ 14-171 of the fundamental and low overtone spectra of CF,CI, because * Although chemical intuition would suggest that the vibrational energy of a polyatomic reaction product might be initially deposited in the newly formed bond, it has been only possible to observe such product energy distribution after considerable intramolecular (coltisionless) relaaation has taken place. See ref. 123).