Intramolecular strain present due to
nonbonded interactions between two
eclipsed atoms or groups. It is, for example, one of the interactions responsible for the existence of a
rotational barrier and hence
restricted rotation about the
C–C
bond in ethane. It has also been called
Pitzer strain,
torsional strain and
bond opposition strain.
Source:
PAC, 1996, 68, 2193
(Basic terminology of stereochemistry (IUPAC Recommendations 1996))
on page 2206
