Exchange-dispersion

This dispersion energy is coupled to an exchange-dispersion component ... 

Principle of corresponding states. Intermolecular potentials, like the induced dipole surfaces, are functionals of the intermolecular interactions. The signatures of electron exchange, dispersion and multipole induction are clearly exhibited in both they have much in common. 

Other approaches do not consider the overlap/exchange/dispersion interactions of the molecule with the surrounding molecules, but only the electric fields and gradients generated by the molecules of the medium. The linear and quadratic response to external static electric fields F and field gradients VF were first introduced by Buckingham (93). 

The effect of multiple exchanges has been computed for the He dimer and found to be negligible in the region of the Van der Waals minimum129. The exchange-dispersion contribution is relatively small, quenching usually only a few percent of the dispersion energy. 

The second-order exchange nonadditivity splits into exchange-induction, exL-ind and exchange-dispersion, h-disP> three-body contributions ... 

AE 1. Exchange-dispersion [e(e2xcJ,.djsp] 2. Exchange-intra-correlation... 

AE 1. Exchange-dispersion nonadditivity [e di-disp] 2. Exchange-intra-correlation nonadditivity (22) 3. Deformation-intra-correlation nonadditivity [e-nd r] 4. Deformation-dispersion nonadditivity [e ind]... 

A comparison of higher order effects also proves instructive A HF has a significant contribution from the induction-dispersion coupling, whereas A HCl, from the exchange-dispersion effect. In conclusion, the three-body effect in these systems represents a somewhat different blend, with the induction-type components being much more important for Ar2HF. 

Masserini R., Fanning K., and Zhang J. Z. (1997) Gas exchange, dispersion, and biological productivity on the west Florida shelf results from a Lagrangian tracer study. Geophys. Res. Lett. 24, 1767-1770. 

He2, while Williams et al [47] have shown that the exchange-dispersion term is negligible in the repulsive region, but that of exchange-induction is not. 

The exchange-induction energy E Jch ind and the exchange-dispersion energy -Eeaefc— H p can 3e viewed as a result of the coupling of the electron exchange with the induction and dispersion interactions. 

Such terms are bound to appear. For instance, the induction effect is connected to deformation of the electron density distribution. The interaction (electrostatic, exchange, dispersive, etc.) of such a deformed object will change with respect to that of the isolated object. The coupling terms take care of this change. 

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