Abstract

FT-IR photoacoustic spectra have been measured at room temperature in the near- and mid-IR range (4700-500 cm⁻¹) for the solid organometallic compounds: CpM(CO)₃ (Cp = η⁵-C₅H₅; M = Mn, Re); CpMn(CO)₂(CS); [CpFe(CO)₂]₂; [CpMo(CO)₃]₂; BzCr(CO)₃ (Bz = η⁶-C₆H₆); BzCr(CO)₂(CS); M₂(CO)₁₀ (M = Mn, Re); and Fe₂(CO)₉. Vibrational assignments have been made for the fundamentals and the binary overtone and combination regions. It is much simpler to obtain data for the 4700-3500 cm⁻¹ near-IR region with the use of PA rather than transmission IR spectroscopy with alkali halide disks since there are no problems with scattering or internal multiple reflectance. FT-IR photoacoustic spectroscopy is a convenient, nondestructive analytical method that should prove extremely useful to organometallic chemists for the rapid identification of their compounds in the solid state.

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