15176-26-8Relevant articles and documents
Transition-Metal Cation Chemistry in 1 Torr of He: M+ + C2H6 Reaction Rates
Tonkyn, Russ,Weisshaar, James C.
, p. 2305 - 2308 (2007/10/02)
We have used laser vaporization of solid metal targets to create first transition series gas-phase metal cations M+ in a fast flow reactor with 1 Torr of He buffer gas.In contrast with single-collision results, all ten first transition series M+ ions, Sc+ through Zn+, react with C2H6 in our multicollision experiment.The major primary product is usually the adduct ion MC2H6+ arising from third-body collisional stabilization of long-lived intermediates.The primary reaction rates vary a factor of 250 across the series.M+ ions having ground-state or low-energy 3dn electron configurations react the fastest with alkanes in 1 Torr of He.
Colloidal Silver Catalyzed Multi-Electron Transfer Processes in Aqueous Solution
Henglein, A.
, p. 253 - 259 (2007/10/02)
(CH3)2COH radicals were γ-radiolytically produced in aqueous solutions of colloidal silver (2.5 * 10-4 mol/l, acetone (0.1-0.2 M) and propanol-2 (0.2-0.4 M).The radicals were able to reduce Cd2+, N2O, and NO3- with yields of practically 100percent.In the absence of colloidal silver, Cd2+ was not reduced, but N2O or NO3- were reduced with yields of the order of 1percent.The reduction processes in the presence of silver occurred in competition with the reduction of water by the organic radicals.The catalytic action of colloidal silver is explained by electron transferfrom the organic radicals to the silver particles that become a pool of electrons and adsorbed hydrogen atoms.The stored electrons are then used to carry out the reduction of water or of dissolved substances.Relative rate constants for a number of multi-electron transfer processes at the colloidal silver pool are given and details of the reaction mechanism including the action of adsorbed Hδ- atoms are discussed. - Radiolytically produced Cd+ ions were also reduced at the colloidal silver pool.However, Zn+, Ni+, and Co+ were found to transfer an electron to the pool.The homogeneous reaction between NO3- and (CH3)2COH was also investigated.A rate constant of 28 M-1s-1 was found for this reaction.
