Chemistry of cis-Trioxatris-σ-homobenzene. α,α-Dioxa-β-thia- and β-Oxa-α,α-dithiatris-σ-homobenzene

✍ Scribed by Prof. Dr. Horst Prinzbach; Dipl.-Chem. Clemens Kaiser; Dr. Hans Fritz

• Publisher: John Wiley and Sons
• Year: 1975
• Tongue: English
• Weight: 234 KB
• Volume: 14
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.197502531

✦ Synopsis

trimethyl phosphite (in THF) to form benzene is fast at 20°C; nevertheless, neither the disulfide nor the monosulfide can be identified as intermediates ('H-NMR) under a variety of conditions (e.g. equimolar ratio; 20 "C). Apparently, elimination of the first sulfur atom has the highest activation energyL6].

The difference between trioxide (1)/triimine (2) and trisulfide ( 7 ) apparent from the course of thermolysis is also clear from the mass spectrum: the peaks (inlet temp. 5&70"C) atmle 174(M+), 141 (M+-SH), 110(M+-2S),78(M+-3S, 100 %), 64 (S 2 ) are typical of the fragmentation pattern arising because of preferential loss of sulfur.