title: Direct observation of adduct formation of alkyl and aromatic iodides with cl atoms using cavity ring-down spectroscopy.
abstract: The reactions of Cl atoms with RI (R = n-C3H7, n-C4H9, cyclo-C6H11, C6H5, C6F5, and p-CH3C6H4) have been studied using cavity ring-down spectroscopy at a temperature range of 233-313 K and at 100 Torr total pressure of N2 diluent. Visible absorption spectra of the RI-Cl adducts were recorded at 440-520 nm at 263 K. The yields of the adducts were temperature-dependent. There was no discernible reaction of the adducts in the presence of 100 Torr of O2 at 263 K. Theoretical calculations were performed for C4H9I-Cl and C6H5I-Cl for quantitative explanation of the absorption spectra and the strength of the I-Cl bonds in the charge-transfer complexes. Evidence for the adduct formation following the reaction of Cl with C6H5Br was sought but not found at 440 and 520 nm.
authors.affiliation: Department of Molecular Engineering and Graduate School of Global Environmental Studies, Kyoto University, Kyoto 615-8510, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Enami
authors.forename: Takashi
authors.initials: T
authors.lastname: Yamanaka
authors.forename: Satoshi
authors.initials: S
authors.lastname: Hashimoto
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kawasaki
authors.forename: Kenichi
authors.initials: K
authors.lastname: Tonokura