X-Ray Structural Analyses of Cyclodecasulfur (S₁₀) and of a Cyclohexasulfur-Cyclodecasulfur Molecular Addition Compound (S₆ · S₁₀) [1]

Abstract

Low temperature X-ray structural analyses of monoclinic single crystals of S 10 and S 6 · Si 10 (prepared from the components) show that the cyclic S 10 molecule exhibits the same D 2 conformation in both compounds with bond distances between 203.3 and 208.0 pm, bond angles (α) between 103 and 111°, and torsional angles (τ) between 73 and 124°. The S 6 molecule (site symmetry C i ) in S 6 · S 10 is very similar to the one in pure S 6 (d SS = 206.2 pm, α= 103°, τ = 74°). All intermolecular interactions are of van-der-Waals type. The Raman spectrum of S 6 · S 10 can be explained by a superposition of the S 6 and S 10 spectra