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internal valence force field

Acronym: IVFF

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 = 1 2 ∑ k i j R i R j
or
V = 1 2 ∑ K i j R i R j
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
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Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi:10.1351/goldbook.I03111.
Original PDF version: http://www.iupac.org/goldbook/I03111.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
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