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2018•Molecular PhysicsOpen access

The rotational spectrum of methyl trifluoroacetate

Luca Evangelisti, Lorenzo Spada, Weixing Li, Ilaria Federici, Walther Camináti

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Abstract

The pulsed supersonic jet expansion microwave spectra of the parent and all three 13C mono-substituted isotopologues of methyl trifluoroacetate have been measured in the 6.5–18 GHz range. All observed transitions are split into two component lines, due to the internal rotation of the methyl group. The corresponding barrier has been determined to be V 3 = 4.379(3) kJ/mol. Structural information has been obtained from the 12 available rotational constants.

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What this paper is about

The pulsed supersonic jet expansion microwave spectra of the parent and all three 13C mono-substituted isotopologues of methyl trifluoroacetate have been measured in the 6.5–18 GHz range. All observed transitions are split into two component lines, due to the internal rotation of the methyl group. The corresponding barrier has been determined to be V 3 = 4.379(3) kJ/mol. Structural information has been obtained from the 12 available rotational constants.

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Available abstract

The pulsed supersonic jet expansion microwave spectra of the parent and all three 13C mono-substituted isotopologues of methyl trifluoroacetate have been measured in the 6.5–18 GHz range. All observed transitions are split into two component lines, due to the internal rotation of the methyl group. The corresponding barrier has been determined to be V 3 = 4.379(3) kJ/mol. Structural information has been obtained from the 12 available rotational constants.

Key concepts: Isotopologue, Supersonic speed, Methyl group, Rotational spectroscopy, Rotational transition, Chemistry, Microwave, Spectral line

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