PREPARATION AND CONFORMATIONAL-ANALYSIS OF 6,10-DISUBSTITUTED [1,2,3]TRITHIOLO[H]BENZOPENTATHIEPIN MONOOXIDES

6,10-Diethyl[1,2,3]trithiolo[h]benzopentathiepin was oxidized with mCP BA (1 eq.) to produce four monooxides, 6,10-diethyl[1,2,3]trithiolo[h] benzopentathiepin 8-oxides and 6,10-diethyl[1,2,3]trithiolo[h]benzopen tathiepin 7-oxides. The structure of the four monooxides obtained was determined by X-ray crystallography. The activation parameters, Delta G(double dagger), Delta H-double dagger, and Delta S-double dagger of these compounds with respect to the inversion of their pentathiepin ri ngs were determined by the results of H-1-NMR spectroscopy. (C) 1997 E lsevier Science Ltd.