The vibrational spectrum of PdCO isolated in solid argon

The infrared spectrum of PdCO isolated in solid argon has been reinvestigat ed. Isotopic data on nu(1), nu(2), nu(3), 2 nu(1), nu(1) + nu(2) and nu(1) + nu(3) have been measured in the near- and far-infrared regions. This enab les us to make a complete harmonic force-field calculation based on a linea r 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. (C) 1999 Elsevier Science B.V. All rights reserved.