anti-Hammond effect

https://doi.org/10.1351/goldbook.A00395
See: More O'Ferrall–Jencks diagram
Source:
PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1085 (https://doi.org/10.1351/pac199466051077)