A force field expressed in terms of
basis coordinates:
where
(or
) are
force constants and the basis coordinates
(or sometimes
) may be internal symmetry coordinates, local symmetry coordinates or any others suitable
to the problem, but the number of the coordinates has to be reduced to
(
for linear molecules),
being the number of atoms in the molecule.
Source:
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.
https://doi.org/10.1351/goldbook.
