The Addition of SF5Br to Unsaturated Systems

• Main Author: Wang, Qui-Chee Wendy
• Format: Others
• Published: PDXScholar 1976
• Subjects: Pentafluorosulphur bromide; Chemical reactions; Chemistry
• Online Access: https://pdxscholar.library.pdx.edu/open_access_etds/2552; https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=3557&context=open_access_etds

Addition reactions of pentafluorosulfur bromide with unsaturated substrates were studied and four new compounds containing the pentafluorosulfur group have been prepared. The mechanism for these reactions seems to involve a radical addition pathway. In reaction with CH2=CFC1, CF3C≡CH and CH3C≡CH the SF5 radical attacks the carbon atoms carrying the most hydrogens. The reaction with CF2=CHCl is interesting, as by analogy with other fluoroolefins, the SF5 primary attack should occur.at the CHCl group, however, SF5CF2CHC1Br was found as the only product for this reaction. The reaction of SF5Br with CF3C≡CH produced two isomers but with CH3C≡CH only one isomer was forrmed. Analytical data, infrared, nmr .and mass spectra are presented supporting the proposed structures for these new compounds.