Journal
HETEROATOM CHEMISTRY
Volume 18, Issue 6, Pages 609-612Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/hc.20302
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The di-ium dication formed by triflic acid protonation of the cyclic triphosphenium ion derived from 1,4-bis-diphenylphosphinobutane, (dppb), and PX3(X = Br or Cl) decomposes via an acyclic dication bearing a -PHX group; this intermediate is reduced by SnX2 in the presence of HX to yield a dication with a -PH2 primary phosphane terminal group, which is comparatively stable. The structure of this species has been unequivocally confirmed by (31)p solution-state NMR spectroscopy. (c) 2007 Wiley Periodicals, Inc.
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