Coupling of vibrational displacements through terms in the
vibrational kinetic energy.
Note:
Two displacement coordinates must share a common atom if they are to undergo kinetic coupling.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 752 (https://doi.org/10.1515/pac-2019-0203)