(thermodynamic control) should be abandoned, or at least seriously amended: kinetic factors appear to exert a primary influence on the regioselectivity of such reactions. Since the two major kinetic factors (i.e., electrophilic character of and steric hindrance at a given silicon atom) have opposite effects on the orientation of the reaction, it may happen that kinetic and thermodynamic control lead to the
Peculiarities in the cleavage by methyllithium of unsymmetrical disilanes
作者:L. Hevesi、M. Dehon
DOI:10.1016/0040-4039(94)80041-3
日期:1994.10
The title reactions did not produce the more stable silyl anions from the disilanes studied, they either occurred by attack at the more electrophilic silicon atom, or led to unexpected products.