Table 1.

Number of electrons, $n_{V_{vdW}}^e$, within vdW volumes ($V_{vdW}$) coming from local basis set electron density for each of the three vdW dimers: acetone (AC), adipic acid (AA) and maleic acid (MA).

	AC	AA	MA
${\mathit{n}}_{{\mathit{V}}_{\mathit{vdW}}}^{\mathit{e}}$	0.1692	0.0566	0.0333
SAPT Total	−5.697	−25.417	−29.080
Ele.	−5.008	−18.686	−17.526
Exch.	13.309	16.331	25.063
Ind.	−2.833	−4.306	−6.360
Disp.	−11.166	−18.757	−22.305

Note that symmetry-adapted perturbation theory (SAPT) energies are given in kJ/mol. The SAPT energy is decomposed into electrostatic (ele.), exchange (exch.), inductive (ind.) and dispersion (disp.) contributions.