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The homocyclic S 11  and S 13  molecules have been synthesized from titanocenepentasulfide and S 6 Cl 2  or S 8 Cl 2 , respectively, and obtained as yellow crystals which are metastable for several days at 20 °C. X-Ray structural analyses of single crystals at -105± 5 °C exhibited molecules of approximately C 2  symmetry with bond distances (d), bond angles (a) and torsional angles (r) in the following ranges: S 11  : d = 203.2 -211.0 pm, α = 103.3-108.6°, τ = 69.3 - 140.5°; S 13 : d = 197.8 - 211.3 pm, α = 102.8-111.1°, τ = 29.5 - 116.3°. Infrared and Raman spectra of S 11  and S 13  are reported. In addition, the synthesis of S 6 Cl 2  and S 8 Cl 2  from S 6  or S 8 , respectively, and chlorine is described.

zeitschrift für naturforschung b

Darstellung, Kristallstruktur und Schwingungsspektren von cyclo-Undekaschwefel (S 11 ) und von cyclo-Tridekaschwefel (S 13 ) / Preparation, Crystal Structure, and Vibrational Spectra of cyclo-Undecasulfur (S 11 ) and of cyclo-Tridecasulfur (S 13 )