frustrated Lewis acid-base pair
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https://doi.org/10.1351/goldbook.08170
Acid and base for which adduct formation is prevented by steric hindrance.
Source:
PAC, 2022,
94
, 353. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)' on page 423 (https://doi.org/10.1515/pac-2018-1010)