SULFUR COMPOUNDS 1411: SYSTEMATIC BUILD-UP OF ORGANIC POLYSULFANES - SYNTHESIS AND SPECTRA OF THE CYCLIC HEPTA- AND OCTASULFANES OF NORBORNANE, C7H10S7AND C7H10S8

The cyclic polysulfanes exo-3,4,5,6,7,8,9-heptathiatricyclo[9.2. 1.02, 10]tetradecane (C7H10S7) and exo- 3,4,5,6,7,8,9,10-octathiatricyclo[10.2.1.02.11]-pentadecane (C7H10S3) have been prepared from the corresponding trisulfane C7H10S3 by chlorination resulting in the two sulfenylchlorides C7H10(SCI)2 and C7H10(SCI) (S2CI) which react with (C5H5)2TiS5 to yield the title compounds in good yields. Similarly, C7H10S5CI2 was obtained from C7H10S5 and Cl2 and yielded C7H10S10 on treatment with (C5H5)2TiS5. The hepta- and octasulfanes form pale-yellow microcrystals which have been characterized by UV, mass, Raman, and 1H NMR spectroscopy. The retention time of C7H10Sn molecules in reversed-phase HPLC is a function of the number of sulfur atoms (n = 3… 12).