Summary: Rappoport9Apeloig, Greenblatt f Solvolysis of 9-(c~-Bromoarylidene)anthrones 3837
aqueous EtOH" is misleading since "TFE-EtOH" should be reserved for
reactions in binary mixturesof the two alcohols.
(34) The method of Raber, Harris. and c~workers"utilizesa statisticalanalysis
of the slope, the intercept,and their uncertainties.Hence, it appears su-
perior in certain cases to the more convenient "two-points'' method.
However,there is an arbitrary criterion which accompanies the statistical
analysis. In our opinion, a parallel arbitrary criterion together with a
quantitativeuse of the log (&E~W/~FE) values of -5 and 1.8 will makethe
two treatments equivalent.
1957; p 167.
New York, 1941; p 146.
(35) Vogel, A. I. "Practical Organic Chemistry", 3rd ed.; Longmans:London,
(36) Rappoport, 2.; Houminer, Y. J. Chem. Soc., Perkin Trans. 2 1974,
(37) Gilman, H.,Blatt, A. H.,Eds. "Organic Syntheses", Collect.Vol. I;Wiley:
(38) Rappoport,2.;Gal, A. J. Chem. SOC.,Perkin Trans. 2 1973, 301.
Vinylic Cations from Solvolysis. 29.l y 2 Solvolysis of
9-(a-Bromoary1idene)anthrones as a Probe to the
Reactivity-Selectivity Relationship in Solvolysis Reactions