Infrared Spectra of the N2-HCl and OC-HCl Complexes

✍ Scribed by A.R.W. Mckellar; Z. Lu

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 472 KB
• Volume: 161
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1993.1256

✦ Synopsis

The (\nu_{1}\left(\mathrm{HCl}\right.) stretch ) bands of the weakly bound complexes (\mathrm{N}{2}-\mathrm{HCl}) and (\mathrm{OC}-\mathrm{HCl}) have been observed in the (3.5-\mu \mathrm{m}) region using a Fourier transform infrared spectrometer and a cooled longpath absorption cell. This is the first infrared observation of (\mathrm{N}{2}-\mathrm{HCl}). Identification of the bands was only possible after careful subtraction of the absorption due to the (\mathrm{HCl}) dimer. An earlier measurement of the (\nu_{2}) (CO stretch) band of (\mathrm{OC}-\mathrm{HCl}) has been extended to higher (J) values. but a search for the (\nu_{2}) band of (\mathrm{N}{2}-\mathrm{HCl}) was not successful. The analysis of these bands yields band origins, rotational parameters, and centrifugal distortion parameters (including (H) ) which give information on intermolecular forces. The (B) value of (\mathrm{OC}-\mathrm{HCl}) was found to increase with (\nu{1}), as in the case of OC-HF, indicating a shortened intermolecular bond. However. (B) for (\mathrm{N}{2}-\mathrm{HCl}) decreased with (\nu{1}), unlike (\mathrm{N}_{2}-\mathrm{HF}).