title: Study of interaction between NO radicals and Martin's spirosilane by means of IR spectroscopy.
abstract: The matrix isolation method is used to record the IR spectrum of C18H8O2F12Si in the 4000-500 cm(-1) range. To gain an IR spectrum with a sufficient resolution, this technique was used with neon as the dilution medium at 5 K. The generated species were characterized by in situ fourier transform infrared (FT-IR) spectroscopy. Once the Martin's spirosilane 1 (C18H8O2F12Si) was characterized, its reactivity toward NO was investigated under the same experimental conditions (i.e., using neon as a dilution medium at 5 K). In this case, the use of neon at very low temperature leads to the formation of a chemically inert matrix in which the species are trapped and isolated from one another, thus hindering consecutive reactions. As a consequence, intermediates can be observed. This approach allowed us to characterize the NO adduct, leading to the formation of 1-(NO). Concentration effects as well as annealing experiments were carried out. In addition to this experimental approach, products were identified by using reference spectra. Our results proved that, in the dilute phase, the reaction between 1 and NO radicals leads to the formation of an adduct. This stable species can further react with NO to form a more stable compound: 1-(NO)2. This proves the ability of such species to trap NO.
authors.affiliation: Laboratoire de Dynamique, Interactions et Réactivité (LADIR, UMR CNRS 7075), Université Pierre et Marie Curie Case 49, 4 place Jussieu, 75252 Paris cedex 05, France. emilie-laure.zins@upmc.fr
authors.forename: E L
authors.initials: EL
authors.lastname: Zins
authors.forename: L
authors.initials: L
authors.lastname: Krim
authors.forename: H
authors.initials: H
authors.lastname: Lenormand
authors.forename: J-P
authors.initials: JP
authors.lastname: Goddard
authors.forename: L
authors.initials: L
authors.lastname: Fensterbank
mesh_terms: D003080:Cold Temperature; D005609:Free Radicals / Q000737:chemistry*; D009356:Neon; D009569:Nitric Oxide / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013141:Spiro Compounds / Q000737:chemistry*
chemical_list: D005609:Free Radicals; D012821:Silanes; D013141:Spiro Compounds; D009569:Nitric Oxide; D009356:Neon