entering group
An atom or group that forms a bond to what is considered to be the main part of the
substrate
during a reaction. For example: the attacking
nucleophile
in a
bimolecular
nucleophilic
substitution reaction
.
Source:
PAC, 1994,
66
, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1113