1. Does a methyl substituent stabilize or destabilize anions?
2. Previous papers in this series include A. Pross, L. Radom and R.W. Taft, J. Org. Chem. in press
3. Previous papers in this series include A. Pross, L. Radom and N.V. Riggs, J. Am. Chem. Soc. in press
4. Previous papers in this series include A.L. Hinde, A. Pross and L. Radom, J. Comput. Chem. in press.
5. Permanent address: Department of Chemistry, Ben Gurion University of the Negev, Beer Sheva, Israel.