radical pair (geminate pair)

The term is used to identify two @[email protected] in close proximity in solution, within a solvent @[email protected] They may be formed simultaneously by some @[email protected] process, e.g. peroxide @[email protected], or they may have come together by @[email protected] While the radicals are together, correlation of the unpaired electron spins of the two species cannot be ignored: this correlation is responsible for the @[email protected] phenomenon. A radical pair is called geminate provided that each radical partner is a descendant of the same parental pair.
See also:
geminate recombination
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1156 [Terms] [Paper]
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1363 [Terms] [Paper]
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2270 [Terms] [Paper]