persistent

https://doi.org/10.1351/goldbook.P04516
A term used to characterize @[email protected] which have lifetimes of several minutes or greater in @[email protected] in @[email protected] solvents. Persistence is a kinetic or reactivity property. In contrast, radical @[email protected], which is a thermodynamic property, is expressed in terms of the C–H bond strength of the appropriate hydrocarbon. The @[email protected] of a radical is profoundly influenced by steric @[email protected] of the radical centre by bulky substituents.
See also:
transient
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1150 [Terms] [Paper]