X-ray structural analyses of two monoclinic allotropes of cycloheptasulfur carried out at -110 °C revealed almost identical chair-like molecular structures of approximate Cs symmetry with bond distances between 199.5 and 218.2 pm, bond angles between 101.5 and 107.5°, and torsional angles between 0 and 109°.
No takes yet. Share an insight, caveat, or question.
Steudel et al. (1980) studied this question.