The gas‐phase structure of bis(fluorosulfonyl)difluoromethane, (SO2F)2CF2

Abstract

AbstractNew synthetic pathways and the infrared spectrum of bis(fluorosulfonyl)difluoromethane, (SO2F)2CF2, are reported. The geometric structure and conformational properties of the title compound have been studied by gas electron diffraction. Depending on the rotational position of the two SO2F groups, four conformers with different symmetries can occur in this compound: C2v symmetry, if both SF bonds stagger the CF2 group. C2 or Cs symmetry, if one SO bond of each group staggers the CF2 group. The experimental electron diffraction intensities can be fitted equally well with a C1 conformer or with a mixture of C2v, C2 and Cs conformers, in a ratio of 3:2:5. The following geometric parameters (ra distances, ∠α angles with 3σ uncertainties) were derived: CF = 1.340(6) Å, SO = 1.412(2) Å, SF = 1.550(3) Å, CS = 1.848(4) Å, SCS = 113.6(7)°, FCF = 110.0(10)°, OSO = 124.6(18)°, CSF = 96.5(16)° and CSO = 108.4(14)°.