N-and C-Attacks on aromatics of phenylnitrenium ion generated from N-phenylhydroxylamine in the presence of trifluoroacetic acid containing polyphosphoric acid or …
H Takeuchi, T Taniguchi, T Ueda
Index: Takeuchi, Hiroshi; Taniguchi, Tomohito; Ueda, Takahiro Journal of the Chemical Society. Perkin Transactions 2, 2000 , # 2 p. 295 - 300
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Citation Number: 17
Abstract
A phenylnitrenium ion formed from N-phenylhydroxylamine in the presence of trifluoroacetic acid (TFA) containing polyphosphoric acid (PPA) interacts with the counterion− O2CCF3 and the unshared electron-pair of H2O, showing Hammett's ρ values− 5.2 and− 4.0 for N- and C-attacks on aromatics PhX (X= H, Me, Et
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