An experimental study of 19F-19F and 13C-19F spin-spin coupling in molecules of difluoro(fluorosulfonyl)- and difluoro(fluorosulfonyloxy)acetyl fluorides

High-resolution ¹⁹F and ¹³C NMR spectra of difluoro(fluorosulfonyl)- and difluoro(fluorosulfonyloxy) acetyl fluorides were studied, and specific features of complex spin-spin coupling of fluorine and carbon nuclei were characterized. The mechanisms of ¹⁹F and ¹³C coupling were interpreted.     

Synthesis and study of boron trifluoride-based catalytic complex participating in hexafluoropropylene sulfotrioxation

Catalytic complexes of boron trifluoride and sulfuric anhydride were experimentally detected and studied by the ¹⁹F NMR method.

     

Energy distribution in strongly perturbed chaotic system

The analytical expression for the energy distribution for the Duffing oscillator that moves chaotically under the strong harmonic perturbation is obtained as a function of the perturbation amplitude and frequency.