5871 Table I. Values of ~ K R for + Various Carbonium Ions and Rates of Solvolysis of the Corresponding Aralkyl Chlorides in Aqueous Acetone Carbonium ion ~
PKR
krei
+
~~
2.2
-6.6"
PhaC+
x
108
T-[~,~,~-(CH~)~CQH~CH~][Cr(C0)31+ T-[P~CH~][C~(CO)~]+ PhzCH+ 2,4,6-(CH3)3GH2CHz+ PhCHz+
-9.3c 2 . 2 x 105 d -11.8' -13.3,a -13.4c 6 . 9 X lo4 -17.3,e -17.W
