1,3,5-Triazin-2,4,6-trisulfenyltrichlorid: Schwingungsspektren und Molekülstruktur1,3,5-Triazine-2,4,6-trisulfenyltrichloride: Vibrational Spectra and Molecular Structure

 The IR, FIR, and Raman (solution and solid state) spectra of 1,3,5-triazine-2,4,6-trisulfenyltrichloride ((NCSCl)3) were investigated for the first time. It was possible to identify all fundamentals in the solid state spectra which were assigned on the basis of a planar molecular structure with C3h symmetry. On the other hand, the solution spectra reveal unambiguously the presence of a conformer of lower symmetry (Cs) in equilibrium with the C3h isomer. Calculations employing the density functional theory were performed (B3LYP/6–31G*). A comparative discussion of the vibrational spectra of (NCSCl)3 (C3h) with respect to those of cyanuric fluoride ((NCF)3), cyanuric chloride ((NCCl)3), and cyanuric bromide ((NCBr)3) reveal a significant dependence of the vibrational situation within the 6-membered heterocyclic ring system on the different substituents in 2,4,6-position. Some modes of 2,4,6-trihalogeno-1,3,5-triazines have been reassigned, e.g. the normal mode v12 of 2,4,6-trifluoro-1,3,5- triazine.