  This work reports an efficient density-fitting implementation of the
density-based basis-set correction (DBBSC) method in the MOLPRO software. This
method consists in correcting the energy calculated by a wave-function method
with a given basis set by an adapted basis-set correction density functional
incorporating the short-range electron correlation effects missing in the basis
set, resulting in an accelerated convergence to the complete-basis-set limit.
Different basis-set correction density-functional approximations are explored
and the complementary-auxiliary-basis-set single-excitation correction is
added. The method is tested on a benchmark set of reaction energies at the
second-order M{\o}ller-Plesset (MP2) level and a comparison with the explicitly
correlated MP2-F12 method is provided. The results show that the DBBSC method
greatly accelerates the basis convergence of MP2 reaction energies, without
reaching the accuracy of the MP2-F12 method but with a lower computational
cost.
