Table 1. Methyl Cation Affinities (MCAs in kJ mol–1 at 298.15 K) for 1, 3, and 4a.
compound | vacuum | chloroform |
---|---|---|
1 (P) | 672 | 532 |
1 (Sb) | 549 | 413 |
3 | 666 | 533 |
4 | 546 | 430 |
Calculated at the PBE0(d3)/def2-TZVP:sdd(Fe,Sb) level of theory. Solvent effects have been approximated using the PCM model. For 1, the site at which methylation occurred is specified.