New infrared spectra of CO2-Ne: Fundamental for CO2-22Ne isotopologue, intermolecular bend, and symmetry breaking of the intramolecular CO2 bend

The infrared spectrum of CO2-Ne complex is studied in the region of the CO2 v3 fundamental vibration. The vibrational fundamentals for both CO2-20Ne and CO2-22Ne are analyzed in combination with available microwave data. In addition, combination bands involving the intermolecular bending mode are observed, leading to the determination of the bending frequency. For the hot band CO2 transition, (0111) F (0110), detection of the weak CO2-Ne spectrum reveals the symmetry breaking of the CO2 v2 bending mode induced by the Ne atom, with the out-of-plane component determined to lie 0.057 cm- 1 higher in energy than the in-plane component.

Automated summary

The infrared spectrum of CO2-Ne complex in the region of the CO2 v3 fundamental vibration was studied, analyzing the vibrational fundamentals for both CO2-20Ne and CO2-22Ne in combination with available microwave data. Combination bands involving the intermolecular bending mode were observed, leading to the determination of the bending frequency.