Abstract

The formation of bimolecular complexes of HOOOH and the HOOO radical with sulfuric acid (H2SO4–HOOOH, H2SO4–HOOO) has been investigated by using DFT (B3LYP/6-311++G(3df,3pd)) and CCSD(T)-F12 methods. For the first time the structures and the binding energies (BEs) for the various isomeric hydrogen-bonded complexes have been reported. The results reveal an unusually stable H2SO4–HOOOH eight-membered ring structure with two relatively strong hydrogen bonds, and with a calculated BE (CCSD(T)-F12) of 12.7kcalmol−1. This is equivalent to the BE in the H2SO4–HOOH complex investigated at the same theoretical level. The complexation of HOOO with H2SO4 stabilizes this metastable polyoxide intermediate by about 10.0kcalmol−1.

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