Survey of main group compounds (HBr) at the Gaussian-4 level of theory: Adiabatic ionization energies and enthalpies of formation

► Gas phase adiabatic ionization energies and enthalpies of formation were calculated. ► Calculations at Gaussian-4 level of theory for 319 and 398 main group compounds. ► Compounds contain elements hydrogen through bromine. ► Good agreement with experimental data was obtained. ► Study provides benchmark set of theoretical data.