The X-ray structures of 2- and 3-sulfolene and two halogenated derivatives

R Alan Aitken*, Alexandra M.Z. Slawin, Dheirya K. Sonecha

*Corresponding author for this work

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Abstract

The structures of the isomeric 2,5-dihydrothiophene 1,1-dioxide [orthorhombic, a = 11.340(2), b = 7.0887(15), c = 6.2811(13) Å, space group Pnma] and 2,3-dihydrothiophene 1,1-dioxide [orthorhombic, a = 6.3903(13), b = 7.2783(16), c = 11.075(2) Å, space group Pnma] have been determined and show perfectly planar rings with the expected bond lengths and angles. In contrast, the halogenated derivatives 3,3,4,4-tetrachlorotetrahydrothiophene 1,1-dioxide [monoclinic, a = 11.8716(8), b = 6.5579(4), c = 11.4802(8) Å, β = 97.705(17), space group P21/c] and 2,3-dibromotetrahydrothiophene 1,1-dioxide [orthorhombic, a = 5.2502(3), b = 11.3561(6), c = 24.9802(17) Å, space group Pbca] both show twisted conformations. The degree of planarity is compared with that in the structures of comparable 5-membered ring cyclic sulfones and C–H…O hydrogen bonding patterns are discussed for all four structures.
Original languageEnglish
Pages (from-to)431-437
Number of pages7
JournalJournal of Chemical Crystallography
Volume53
Issue number3
Early online date29 Mar 2023
DOIs
Publication statusPublished - 1 Sept 2023

Keywords

  • Cyclic sulfones
  • X-ray structure
  • Conformation

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