Detection of a higher energy isomer of the CO–N2O van der Waals complex and determination of two of its intermolecular frequencies

Infrared spectra in the carbon monoxide CO stretch region (∼2150 cm−1) and in the ν3 asymmetric stretch region of N2O (∼2223 cm−1) are assigned to the previously unobserved O-bonded form of the CO–N2O dimer (“isomer 2”).