  Using the observed proportionality of CCSD(T) and MP2 correlation interaction
energies [I. Grabowski, E. Fabiano, F. Della Sala, Phys. Chem. Chem. Phys. 15,
15485 (2013)] we propose a simple scaling procedure to compute accurate
interaction energies of non-covalent complexes. Our method makes use of MP2 and
CCSD(T) correlation energies, computed in relatively small basis sets, and
fitted scaling coefficients to yield interaction energies of almost complete
basis set limit CCSD(T) quality. Thanks to the good transferability of the
scaling coefficients involved in the calculations, good results can be easily
obtained for different intermolecular distances.
