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Synthesen mit 2,4,4‐Trifluor‐1,3‐dithietan‐2‐ylium‐hexafluoroarsenat
Author(s) -
Waterfeld Alfred
Publication year - 1990
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19901230808
Subject(s) - chemistry , trimer , salt (chemistry) , yield (engineering) , alkylation , medicinal chemistry , fluoride , stereochemistry , dimer , organic chemistry , inorganic chemistry , catalysis , materials science , metallurgy
Syntheses with 2,4,4Trifluoro‐1,3‐dithietan‐2‐ylium Hexafluoroarsenate The 2‐bromo and 2‐iodo cations ‐X (XBr, I) are prepared as stable salts 3a and 4a from the title compound ‐F AsF ‐ 6 ( 1a ). Salt 1a reacts with BaCS 3 to yield the new cyclic thiocarbonyl compound ( 5 ). Alkylation of 5 with CF 3 F/AsF 5 produces the trithiocarbenium salt ‐SCH 3 AsF ‐ 6 ( 5a ). Difluorothiophosgene ( 7 ) and its trimer (F 3 CS) 2 CS ( 8 ) add to the cation of 1a to form ‐SCF 3 AsF ‐ 6 ( 10a ), the perfluorinated analog of 5a . The cation of 10a unlike 5a adds a fluoride ion to give ‐SCF 3 ( 10 ), a new isomer of 8 .