The gem-dimethyl effect revisited.
Computation of the ring strain energy of 1,1-dimethylcyclobutane with a variety of methods reveals that there is no significant enthalpic component of the gem-dimethyl effect as measured by the ring strain energy.
Bachrach
Steven M
SM
Department of Chemistry, Trinity University, 1 Trinity Place, San Antonio, Texas 78212 sbachrach@trinity.edu.