Acta Crystallographica Section C

Crystal Structure Communications

Volume 58, Part 8 (August 2002)

Acta Cryst. (2002). C58, o480-o484 [doi:10.1107/S0108270102011319]

Four bis(1-chloro-2,2,4,4-tetramethyl-3-oxocyclobutan-1-yl)oligosulfanes

A. Linden, A. Majchrzak, J. Cavegn, G. Mloston and H. Heimgartner

Abstract: The four oligosulfanes, bis(1-chloro-2,2,4,4-tetramethyl-3-oxocyclobutan-1-yl)disulfane, C₁₆H₂₄Cl₂O₂S₂, (III), 1,3-bis(1-chloro-2,2,4,4-tetramethyl-3-oxocyclobutan-1-yl)trisulfane, C₁₆H₂₄Cl₂O₂S₃, (V), 1,4-bis(1-chloro-2,2,4,4-tetramethyl-3-oxocyclobutan-1-yl)tetrasulfane, C₁₆H₂₄Cl₂O₂S₄, (VII), and 1,6-bis(1-chloro-2,2,4,4-tetramethyl-3-oxocyclobutan-1-yl)hexasulfane, C₁₆H₂₄Cl₂O₂S₆, (VIII), all have similar geometric parameters, with the C-C bond lengths involving the chloro-substituted cyclobutanyl C atom being elongated to about 1.59 Å. There are two molecules in the asymmetric units of the tri- and tetrasulfanes, and the molecules in the latter compound have local C₂ symmetry. The molecule of the hexasulfane has crystallographic C₂ symmetry. Most of the cyclobutanyl rings are not perfectly planar and have slight but varying degrees of distortion towards a flattened tetrahedron. The polysulfane chain in each structure has a helical conformation, with each additional S atom in the chain adding approximately one quarter of a turn to the helix.

Formula: C₁₆H₂₄Cl₂O₂S₂, C₁₆H₂₄Cl₂O₂S₃, C₁₆H₂₄Cl₂O₂S₄ and C₁₆H₂₄Cl₂O₂S₆

Online 20 July 2002


	Structure factor file (CIF format) (264.5 kbytes) Contains datablock III

	Structure factor file (CIF format) (575.8 kbytes) Contains datablock V

	Structure factor file (CIF format) (616.0 kbytes) Contains datablock VII

	Structure factor file (CIF format) (133.6 kbytes) Contains datablock VIII

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