Gas-phase IR photoacoustic (PA) spectra have been obtained for the volatile, solid pentacarbonyl(methyl)metal(I) complexes, CH3Mn(CO)5 and CH3Re(CO)5. The gaseous samples were apparently produced directly in the PA sample cup as the result of local surface heating effects. Vibrational assignments are given for the gas-phase spectra, especially for the binary v(CO) overtone and combinations which absorb in the near-IR region at ~4000 cm−1. The data provide further support for near-IR/PA spectroscopy being a useful technique for the rapid, non-destructive identification of small amounts of organometallic carbonyl complexes.
Ian S. Butler, Denis F. R. Gilson, and Dominique Lafleur, "Infrared Photoacoustic Spectra of Gaseous Pentacarbonyl(methyl)manganese(I) and Pentacarbonyl(methyl)rhenium(I)," Appl. Spectrosc. 46, 1605-1607 (1992)
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