Using a set of accurate experimental data for calibration, we have con
structed an empirical exchange-correlation density functional, EDF1. W
hen applied self-consistently with the 6-31 + G basis set, EDF1 yield
s results in significantly better agreement with the experimental data
than either the B-LYP or B3-LYP functional. (C) 1998 Elsevier Science
B.V.