Observation of the infrared spectrum of the ν3 band of the argon-ammonium ionic complex

✍ Scribed by Evan J. Bieske; Sergey A. Nizkorodov; Otto Dopfer; John P. Maier; Ross J. Stickland; Bryan J. Cotterell; Brian J. Howard

• Book ID: 103033495
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 477 KB
• Volume: 250
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(96)00029-2

✦ Synopsis

The infrared spectrum of the rare gas-tetrahedral molecule ionic complex Ar-NH~-has been detected. In the region of the u 3 (t 2) triply degenerate vibration of the NH~-monomer, a parallel and a perpendicular band are observed. Tunnelling splittings of the Q branches of the latter band are attributed to substantially hindered internal rotation of the NH~-unit. A recently developed model of atom-spherical top complexes is applied to estimate anisotropic terms in the intermolecular potential; both the vibrational anisotropy of the order of 90 cm-i and the rotational anisotropy ---220 cm-] are substantial.