The prefix for an elementary reaction
or some part thereof indicating that the bond(s) undergoing primitive changes form
part of a ring in the transition state
of the elementary reaction
. This prefix is used for nonpericyclic processes only and is replaced by 'cyclo
' for pericyclic processes.
PAC, 1989, 61, 23
(System for symbolic representation of reaction mechanisms (Recommendations 1988))
on page 34
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook