Preferred Label : free rotation;
Detailed label : free rotation (hindered rotation, restricted rotation);
IUPAC definition : In a stereochemical context the rotation about a bond is called 'free' when the rotational
barrier is so low that different conformations are not perceptible as different chemical
species on the time scale of the experiment. The inhibition of rotation of groups
about a bond due to the presence of a sufficiently large rotational barrier to make
the phenomenon observable on the time scale of the experiment is termed hindered rotation
or restricted rotation.;
Origin ID : F02520;
See also
In a stereochemical context the rotation about a bond is called 'free' when the rotational
barrier is so low that different conformations are not perceptible as different chemical
species on the time scale of the experiment. The inhibition of rotation of groups
about a bond due to the presence of a sufficiently large rotational barrier to make
the phenomenon observable on the time scale of the experiment is termed hindered rotation
or restricted rotation.
