Enthalpies of formation for organosulfur compounds: Atomization energy and hypohomodesmotic reaction schemes via ab initio composite methods

► Organosulfur hypohomodesmotic reactions proposed. ► Reaction schemes used to calculate organosulfur compound enthalpies of formation. ► Single point calculations and composite methods investigated with reaction schemes. ► Hypohomodesmotic reactions eliminate differential correlation and size extensivity. ► Hypohomodesmotic reactions allow for chemically accurate enthalpies of formation.