Table 1. MP2c Contribution to the MP2 Interaction Energy for Selected Systems from the S22 Set and Pair Density Cutoff Energies ^a.

S22 system	rx ry rz	Ω [Å3]	[Ry]	ΔEMP2c	σMP2c
(NH3)2	2.0 2.0 2.0	987.84	150	–1.763	0.004
			300	–1.762	0.004
			600	–1.762	0.004
(H2O)2	1.7 1.9 2.2	648.86	150	–1.354	0.004
			300	–1.347	0.004
			600	–1.347	0.004
formic acid	1.5 1.6 2.3	953.50	150	–3.093	0.013
			300	–3.095	0.013
formamide	1.4 1.4 1.4	539.82	150	–3.658	0.004
			300	–3.655	0.005
			600	–3.655	0.006
PD benzene	1.8 1.8 1.8	2913.80	150	–10.470	0.021
			300	–10.461	0.024

^aEnergies are in kcal/mol, obtained with the MT Poisson solver. r_x,y,z are the respective x, y, z ratios of the orthorhombic supercell dimensions with respect to the HF electron density measured at an isosurface of 0.002 au, while Ω is the volume of the supercell. σ^MP2_c corresponds to the standard deviation of ΔE^MP2_c values extrapolated on different fitting ranges in the virtual space.