Reaction Of Hydrogen Iodide Research Articles

Investigation into the Reaction of Hydrogen Iodide with a Chlorine Atom in the Atmosphere above the Sea

Investigation into the Reaction of Hydrogen Iodide with a Chlorine Atom in the Atmosphere above the Sea

Chemical oxygen-iodine laser using a new method of atomic iodine generation

The chemical oxygen-iodine laser (COIL) with a new chemical method of atomic iodine production was investigated. In this system, iodine atoms are formed in the COIL cavity by the fast chemical reaction of hydrogen iodide with chlorine atoms that are also produced chemically. It was found that, in the absence of singlet oxygen, the ground state atomic iodine can be produced with a high yield (80%-100%). In gas containing singlet oxygen, a gain on 3-4 electronic transition in iodine atom was achieved (0.35% cm/sup -1/). Both the concentration of atomic iodine and the gain depend substantially on the ratio of reacting gases and the penetration of secondary gases into the primary gas flow. In laser experiments, effects of the flow rate of reacting gases and their penetration on the laser output power were found. The output power of 310 W was attained at chlorine flow rate of 27 mmol/spl middot/s/sup -1/ corresponding to chemical efficiency of 12.7%. This was the first time the gain and laser output power were achieved in the COIL with atomic iodine generated by the proposed method.

Chemical generation of atomic iodine for chemical oxygen–iodine laser. I. Modelling of reaction systems

The mathematical modelling of reaction systems for chemical generation of atomic iodine is presented. This process is aimed to be applied in the chemical oxygen–iodine laser (COIL), where it can save a substantial part of energy of singlet oxygen and so increase the laser output power. In the suggested method, gaseous reactants for I atoms generation are admixed into the COIL primary gas flow containing singlet oxygen. Two reaction systems were proposed, based on the reaction of hydrogen iodide with chemically generated atomic fluorine or chlorine. It was found that the reaction path via Cl atoms better matches the experimental conditions of COIL with a yield of atomic iodine of up to 67%. As a result of modelling, a suitable reaction system and design of experimental arrangement for the effective production of atomic iodine in laser conditions were found.

Accurate measurement of vibrational transition energies for a wide range of v, J states using CARS spectroscopy of chemical reaction products: spectroscopy of hydrogen from the hydrogen-atom + hydrogen iodide reaction

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAccurate measurement of vibrational transition energies for a wide range of v, J states using CARS spectroscopy of chemical reaction products: spectroscopy of hydrogen from the hydrogen-atom + hydrogen iodide reactionGeoffrey J. Germann and James J. ValentiniCite this: J. Phys. Chem. 1988, 92, 13, 3792–3795Publication Date (Print):June 1, 1988Publication History Published online1 May 2002Published inissue 1 June 1988https://doi.org/10.1021/j100324a022RIGHTS & PERMISSIONSArticle Views59Altmetric-Citations12LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (551 KB) Get e-Alerts

Kinetics and mechanism of methanol carbonylation over RhY zeolite

Methanol carbonylation over RhY zeolite was studied kinetically at 428 to 473 K under atmospheric pressure. For low conversions of methanol, methyl acetate was the only carbonylation product observed. The reaction was first order in methyl iodide and zero order in both methanol and carbon monoxide. The apparent activation energy was 5.65 × 104 J/mol in the temperature range studied. Carbonylations in the ethanol-methyl iodide, methanol-ethyl iodide, and deuterated methanol-methyl iodide systems were studied to clarify the reaction mechanism. From these results, the reaction mechanism for this carbonylation is proposed as follows: (i) the oxidative addition of methyl iodide to an active Rh site, (ii) the insertion of carbon monoxide into the methyl-Rh bond, (iii) the formation of methyl acetate by methanolysis of the acetyl-Rh bond, (iv) the reductive dissociation of hydrogen iodide to reform the active site, and (v) the regeneration of methyl iodide by the reaction of hydrogen iodide with methanol. This reaction mechanism is quite similar to that proposed for the homogeneous rhodium complex catalyst.

Germyl chemistry. Part I. A convenient synthesis of germyl iodide and di-iodogermane

Germyl iodide and di-iodogermane have been prepared in high yield at room temperature by reaction of hydrogen iodide with germyl chloride and dichlorogermane, respectively. Di-iodogermane has been characterised for the first time; its infrared and n.m.r. spectra are described.

The Para-Ortho Hydrogen Conversion by the Hydrogen Iodide Reaction and by Iodine Atoms

The rate of conversion of para to ortho hydrogen was determined in the presence of equilibrium concentrations of hydrogen iodide and iodine. From these data, velocity constants and collision efficiencies for the conversion by iodine atoms were calculated. The results are in agreement with a theoretical equation derived by Wigner.