S. Okovytyy
304
2
2
2
2
2
2
2
2
2
$%
+ VXSHUPROHFXODU
N-PRO>@
. UHO >@
+ VXSHUPROHFXODU
N-PRO>@
. UHO >@
2
2
2+
&+ 2
2
+
+
&+ 2+
&+ 2
≠
≠
∆
α
∆
Calculated values of ∆Н
≠
for epoxides (12, 14, 15, 18, 19) are in a good agreement
with kinetic studies:
rel
lgk
16.86
H 163.94, r 0.90, n 5
≠
= -
× ∆ +
=
=
+
2
+
2
+
2
+
2
+
2
2
2
+
2
+ 2
+
2
+
2
+
2
2
2
Fig. 10.5  Structure of transition states in the methanolysis of stereoisomeric epoxynorbornanes
(7, 8), calculated in the supermolecular approximation (n = 4, m = 1)