The vibrational spectrum of PdCO isolated in solid argon Original Research Article

The infrared spectrum of PdCO isolated in solid argon has been reinvestigated. Isotopic data on ν1, ν2, ν3, 2ν1, ν1+ν2 and ν1+ν3 have been measured in the near- and far-infrared regions. This enables us to make a complete harmonic force-field calculation based on a linear geometry, in agreement with all theoretical predictions. Comparisons with bond force constants of NiCO and CuCO and the latest ab initio predictions of the PdCO vibrational frequencies are also presented.