title: On the gas phase hydrogen bond complexes between formic acid and hydroperoxyl radical. A theoretical study.
abstract: We present a systematic study on the gas-phase hydrogen-bonded complexes formed between formic acid and hydroperoxyl radical, which has been carried out by using B3LYP and CCSD(T) theoretical approaches in connection with the 6-311+G(2df,2p) basis set. For all complexes we have employed the AIM theory by Bader and the NBO partition scheme by Weinhold to analyze the bonding features. We have found 17 stationary points, and 11 of them present a cyclic structure. Their computed stabilities vary from 0.3 to 11.3 kcal/mol, depending on several factors, such as involvement in the hydrogen bond interaction, the geometrical constraints, and the possible concurrence of further effects such as resonance-assisted hydrogen bonds or inductive effects. In addition, three stationary points correspond to transition structures involving a double proton-transfer process whose features are also analyzed.
authors.affiliation: Institut de Química Computacional and Departament de Química, Universitat de Girona, E-17071 Girona, Catalonia, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Torrent-Sucarrat
authors.forename: J M
authors.initials: JM
authors.lastname: Anglada
mesh_terms: D005561:Formates / Q000737:chemistry*; D005609:Free Radicals / Q000737:chemistry; D005740:Gases / Q000737:chemistry*; D006860:Hydrogen Bonding; D006861:Hydrogen Peroxide / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D014732:Vibration
chemical_list: D005561:Formates; D005609:Free Radicals; D005740:Gases; C030544:formic acid; D006861:Hydrogen Peroxide