High-Resolution FTIR Study of the PH Stretching Bands ν1 and ν5 of PH2F and PH2Cl

✍ Scribed by H. Beckers; H. Burger; M. Paplewski

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 411 KB
• Volume: 171
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1995.1141

✦ Synopsis

The FTIR spectra in the (v_{1}) and (\nu_{5}) ( (\mathrm{PH}) stretching) regions of the short-lived molecules (\mathrm{PH}{2} \mathrm{~F}) and (\mathrm{PH}{2} \mathrm{Cl}) have been recorded with a resolution of (5.5 \times 10^{-3} \mathrm{~cm}^{-1}). The rovibrational analysis of the (A / C^{-})- and (B)-type bands yielded excited state parameters, and relative transition moments of the (\nu_{1}) and (\nu_{5}) bands as well as the (\mu_{4}: \mu_{C}) ratio of (\nu_{1}) were estimated by band contour simulations. The band centers were determined: (\mathrm{PH}{2} \mathrm{~F}, \nu{1} 2283.11950(4), \nu_{5} 2286.97185(4)) : and (\mathrm{PH}{2}{ }^{35} \mathrm{Cl}). (\nu{1} 2203.43762(4), \nu_{5} 2309.67696(4) \mathrm{cm}^{-1}). In (\mathrm{PH}{2} \mathrm{~F}), weak (c)-1ype Coriolis resonance effects with (\zeta{i, 5}=0.0120) were found to affect the (K_{a}=1) and (K_{a}=0) levels of (\nu_{1}) and (\nu_{5}), respectively. The experimental results are in good agreement with previously reported predictions from ab initio harmonic and anharmonic force fields. o 1995 Academic Press. Inc