title: Structures, Energetics, and IR Spectra of Monohydrated Inorganic Acids: Ab initio and DFT Study.
abstract: We carried out extensive calculations of diverse inorganic acids interacting with a single water molecule, through a detailed analysis of many possible conformations. The optimized structures were obtained by using density functional theory (DFT) and the second order Møller-Plesset perturbation theory (MP2). For the most stable conformers, we calculated the interaction energies at the complete basis set (CBS) limit using coupled cluster theory with single, double, and perturbative triple excitations [CCSD(T)]. The -OH stretching harmonic and anharmonic frequencies are provided as fingerprints of characteristic conformers. The zero-point energy (ZPE) uncorrected/corrected (ΔEe/ΔE0) interaction energies and the enthalpies/free energies (ΔHr/ΔGr at room temperature and 1 bar) are reported. Various comparisons are made between many diverse inorganic acids (HmXOn where X = B/N/P/Cl/Br/I, m = 1-3, and n = 0-4) as well as other simple inorganic acids. In many cases, we find that the dispersion-driven van der Waals interactions between X in inorganic acid molecules and O in water molecules as well as the X(+)···O(-) electrostatic interactions are important.
authors.affiliation: Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology , San 31, Hyojadong, Namgu, 790-784 Pohang, South Korea.
authors.forename: Maciej
authors.initials: M
authors.lastname: Kołaski
authors.affiliation: Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology , San 31, Hyojadong, Namgu, 790-784 Pohang, South Korea.
authors.forename: Aleksey A
authors.initials: AA
authors.lastname: Zakharenko
authors.affiliation: Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology , San 31, Hyojadong, Namgu, 790-784 Pohang, South Korea.
authors.forename: S
authors.initials: S
authors.lastname: Karthikeyan
authors.affiliation: Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology , San 31, Hyojadong, Namgu, 790-784 Pohang, South Korea.
authors.forename: Kwang S
authors.initials: KS
authors.lastname: Kim