Trifluoroethyl methansulfonate (methylsulfonyl), TFMSMS is a new compound derived from Clomesone, which was obtained in solid state. As no experimental geometric parameters were available, a conformational exploration was carried out (using the concept of "conformational transferability"), resulting a single stable conformation at room temperature. Infrared, Raman, and liquid NMR spectra were measured. The contributions of the donor -> acceptor interaction energies were also analyzed by Natural Bond Orbitals (NBO) approximations and topological properties (AIM). These results evidenced that electron delocalization and especially LP O -> sigma*O(3)-C(3) interaction play an important role in the reactivity-structure connection of oxoesters and thioesters. TFMSMS could partially inhibit growth and biofilm formation on Pseudomonas aeruginosa and Staphylococcus aureus strains. Moreover, this is the first study demonstrating the methansulfonate complex interference with the Quorum sensing system in Gram-negative bacteria.

Bis - (methylsulfonylmethyl) sulfone, BMSMS, was synthesized and characterized through vibrational (IR, Raman) spectroscopy. The crystal structure of BMSMS, determined by X-ray diffraction methods, together with Hirshfeld surfaces analysis were used to evaluate intermolecular interactions. BMSMS can be considered as one-turn helix of about 7.13 Å, further stabilized by weak intra-molecular CH•••O bonds. The experimental results were supplemented by quantum chemical calculations. It was also analyzed the hyperconjugative effects of oxygen atoms lone pairs (LP) on the vibrational behavior of the SO2 group. Besides, biofilm formation and QS activity were evaluated on this new bis- (methylsulfonylmethyl) sulfone.

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

This is a study of structure – reactivity relationship of clomesone.

Methyl trifluoromethanethiosulfonate, CF3SO2SCH3, was synthesized and characterized by 13C NMR, 19F NMR, and vibrational spectroscopy. This structural study was supported by MP2 and DFT (B3LYP and MPW1PW91) calculations, which revealed a strong dependence of the theoretical structure on the polarization of the basis set. Theoretical data indicate that only one conformer, gauche, is predicted by rotating around the S–S bond. This conformational preference was studied using the total energy scheme and natural bond orbital partition scheme. These results evidence that electron delocalization and especially LP S→σ∗ C(1)-S interactions play an interesting role in the reactivity-structure connection of oxoesters and thioesters.Gas and liquid infrared and liquid Raman spectra were recorded and assigned. The experimental vibrational data along with theoretical force constants (B3LYP) were used to define a scaled quantum mechanical force field, which enabled the reproduction of the measured frequencies with a final root-mean-square deviation of 8.06cm−1.

The experimental and theoretical study on the molecular and vibrational analysis of CF3CH2CH2SO2Cl, 3,3,3-trifluoropropane-1-sulfonyl chloride is presented. The IR and Raman spectra were recorded in liquid state and compared with the spectral data obtained by the DFT/B3LYP method usingthe6-311G(3df) basis set. The influence of hyperconjugation effects of the lone pairs (LP) chlorine atom on the vibrational behavior of the group SO2 was determined. The TD-DFT approach was applied to assign the electronic transitions observed in the UV–visible spectrum.