Synthesis and Structure of a Novel Cyclic Polysulfide, 2,4,6-Trisphenyloctathionane

Article abstract of DOI:10.1246/bcsj.68.2757

A novel cyclic polysulfide, octathionane TbtCHS8 (7; Tbt=2,4,6-trisphenyl) was synthesized by thermal reaction of the corresponding diazomethane TbtCHN2 with cyclooctasulfur (S8) in benzene in the dark.Molecular structure of 7 was determined by X-ray crystallographic analysis and the geometry of the C8 ring was compared with that of theoretically optimized cyclononanosulfur (S9).Desulfuration of 7 by triphenylphosphine afforded the corresponding pentathiane TbtCHS5.