Infrared bands of CS dimer and trimer at 4.5 μm.

08:00 EDT 14th April 2019 | BioPortfolio

Summary of "Infrared bands of CS dimer and trimer at 4.5 μm."

We report observation of new infrared bands of (CS) and (CS) in the region of the CS ν + ν combination band (at 4.5 µm) using a quantum cascade laser. The complexes are formed in a pulsed supersonic slit-jet expansion of a gas mixture of carbon disulfide in helium. We have previously shown that the most stable isomer of (CS) is a cross-shaped structure with D symmetry and that for (CS) is a barrel-shaped structure with D symmetry. The dimer has one doubly degenerate infrared-active band in the ν + ν region of the CS monomer. This band is observed to have a rather small vibrational shift of -0.844 cm. We expect one parallel and one perpendicular infrared-active band for the trimer but observe two parallel bands and one perpendicular band. Much larger vibrational shifts of -8.953 cm for the perpendicular band and -8.845 cm and +16.681 cm for the parallel bands are observed. Vibrational shifts and possible vibrational assignments, in the case of the parallel bands of the trimer, are discussed using group theoretical arguments.


Journal Details

This article was published in the following journal.

Name: The Journal of chemical physics
ISSN: 1089-7690
Pages: 144305


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