internal valence force field (IVFF)

https://doi.org/10.1351/goldbook.I03111
A force field expressed in terms of bond-stretching,
angle
-bending, torsional and other displacements directly connected to the structural parameters of the molecule: V=12 kij Ri Rj or V=12 Kij Ri Rj where k (or K) are the
force constants
and R the internal
valence
coordinates.
Source:
PAC, 1978, 50, 1707. (Definition and Symbolism of Molecular Force Constants) on page 1709 [Terms] [Paper]