Rapid estimation of enthalpies of formation from hartree-fock total energy and partial charges for compounds containing Si, S, and Cl atoms

Four new REEF-HF parameter sets are developed for HF/6-31G(d) or HF/6-311+G(2d,p) energies and the corresponding NPA or mulliken charges. All parameter sets were developed and tested on the same molecular database set of 161 closed-shell neutral molecules composed of H, C, N, O, F, Si, S, and Cl atoms.