The analysis of the near IR of some organic and organometallic compounds by photoacoustic spectroscopy

The photoacoustic spectrum (PAS) was measured in the near IR region (1000 to 2600 nm) for organic compounds (C₆H₆, C₆D₆, C₇H₈, and C₆H₁₂) and organometallic compounds (Cp₂Fe, Cp₂Fe₂(CO)₄, Cp₄Fe₄(CO)₄, Cp₄Fe₄S₄, C₆H₆Cr(CO)₃, CpCo(C₄Ph₄) and CpCo(CO)₂). Band assignments were made by comparison to the infrared spectra. The bands were assigned as the CH overtone stretch and combinations of CH and other IR fundamentals. These bands provide fingerprint spectra for these compounds.