eclipsing strain
Synonyms
: bond opposition strain, Pitzer strain, torsional strain
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