title: Vibrational spectra and gas-phase structure of N-methyl-S,S-bis(trifluoromethyl)sulfimide, CH3N=S(CF3)2.
abstract: The molecular structure of N-methyl-S,S-bis(trifluoromethyl)sulfimide, CH3N=S(CF3)2, was determined by gas electron diffraction and quantum chemical calculations [B3LYP and MP2 with 6-31+G(2df,p) basis sets]. Furthermore, vibrational spectra, IR (gas) and Raman (liquid), were recorded. These spectra were assigned by comparison with analogous molecules and with calculated frequencies and intensities (HF, B3LYP, and MP2 with 6-311G basis sets). All experimental data and computational methods result in a single conformer with syn orientation of the CH3 group relative to the bisector of the two CF3 groups. The molecule possesses C1 symmetry, slightly distorted from CS symmetry. The N=S bond length in this compound [1.522(10) A] is longer than that in imidosulfur difluorides RN=SF2 [1.476(4) A - 1.487(5) A].
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Trautner
authors.forename: Rosa M S
authors.initials: RM
authors.lastname: Alvarez
authors.forename: Edgardo H
authors.initials: EH
authors.lastname: Cutin
authors.forename: Norma L
authors.initials: NL
authors.lastname: Robles
authors.forename: Rüdiger
authors.initials: R
authors.lastname: Mews
authors.forename: Heinz
authors.initials: H
authors.lastname: Oberhammer