Preferred Label : inductive effect;
IUPAC definition : In strict definition, an experimentally observable effect (on rates of reaction, etc.)
of the transmission of charge through a chain of atoms by electrostatic induction.
A theoretical distinction may be made between the field effect, and the inductive
effect as models for the coulomb interaction between a given site within a molecular
entity and a remote unipole or dipole within the same entity. The experimental distinction
between the two effects has proved difficult, except for molecules of peculiar geometry,
which may exhibit 'reversed field effects'. Ordinarily the inductive effect and the
field effect are influenced in the same direction by structural changes in the molecule
and the distinction between them is not clear. This situation has led many authors
to include the field effect in the term 'inductive effect'. Thus the separation of
values into inductive and resonance components does not imply the exclusive operation
of a through-bonds route for the transmission of the non-conjugative part of the substituent
effect. To indicate the all-inclusive use of the term inductive, the phrase 'so-called
inductive effect' is sometimes used. Certain modern theoretical approaches suggest
that the 'so-called inductive effect' reflects a field effect rather than through-bonds
transmission.;
Origin ID : I03021;
See also
In strict definition, an experimentally observable effect (on rates of reaction, etc.)
of the transmission of charge through a chain of atoms by electrostatic induction.
A theoretical distinction may be made between the field effect, and the inductive
effect as models for the coulomb interaction between a given site within a molecular
entity and a remote unipole or dipole within the same entity. The experimental distinction
between the two effects has proved difficult, except for molecules of peculiar geometry,
which may exhibit 'reversed field effects'. Ordinarily the inductive effect and the
field effect are influenced in the same direction by structural changes in the molecule
and the distinction between them is not clear. This situation has led many authors
to include the field effect in the term 'inductive effect'. Thus the separation of
values into inductive and resonance components does not imply the exclusive operation
of a through-bonds route for the transmission of the non-conjugative part of the substituent
effect. To indicate the all-inclusive use of the term inductive, the phrase 'so-called
inductive effect' is sometimes used. Certain modern theoretical approaches suggest
that the 'so-called inductive effect' reflects a field effect rather than through-bonds
transmission.
