Preferred Label : ion pair return;
IUPAC definition : The recombination of a pair of ions R sup class plus /sup and Z sup class minus
/sup formed from ionization of RZ. If the ions are paired as a tight ion pair and
recombine without prior separation into a loose ion pair this is called 'internal
ion-pair return': It is a special case of 'primary geminate recombination'. If the
ions are paired as a loose ion pair and form the covalent chemical species via a tight
ion pair, this is called 'external ion-pair return': It is a special case of 'secondary
geminate recombination'. When the covalent molecule RZ is reformed without direct
evidence of prior partial racemization or without other direct evidence of prior formation
of a tight ion pair, (e.g. without partial racemization if the group R is suitably
chiral) the internal ion-pair return is sometimes called a 'hidden return'. External
(unimolecular) ion-pair return is to be distinguished from 'external (bimolecular)
ion return', the (reversible) process whereby dissociated ions are converted into
loose ion pairs:;
Origin ID : I03233;
See also
The recombination of a pair of ions R sup class plus /sup and Z sup class minus
/sup formed from ionization of RZ. If the ions are paired as a tight ion pair and
recombine without prior separation into a loose ion pair this is called 'internal
ion-pair return': It is a special case of 'primary geminate recombination'. If the
ions are paired as a loose ion pair and form the covalent chemical species via a tight
ion pair, this is called 'external ion-pair return': It is a special case of 'secondary
geminate recombination'. When the covalent molecule RZ is reformed without direct
evidence of prior partial racemization or without other direct evidence of prior formation
of a tight ion pair, (e.g. without partial racemization if the group R is suitably
chiral) the internal ion-pair return is sometimes called a 'hidden return'. External
(unimolecular) ion-pair return is to be distinguished from 'external (bimolecular)
ion return', the (reversible) process whereby dissociated ions are converted into
loose ion pairs:
