Written in English
|Statement||by Grant Delbert Venerable II.|
|LC Classifications||Microfilm 29189|
|The Physical Object|
|Pagination||xii, 206 l.|
|Number of Pages||206|
|LC Control Number||92895818|
Abstract The oxidation of some transition-metal cyanide compounds by hydroxyl radical in aqueous media has been investigated by pulse radiolysis. Effect of sodium and acetate ions on 8-hydroxyguanine formation in irradiated aqueous solutions of DNA and 2′-deoxyguanosine 5′-monophosphate. the mechanisms of the thermal and photoinduced oxidation of D -mannitol and fucoidan by transition metal complexes and inorganic radicals. Pulse radiolysis of methyl acetate in aqueous. PROPERTIES OF TRANSITION METAL COMPLEXES WITH METAL–CARBON BONDS IN AQUEOUS SOLUTIONS AS STUDIED BY PULSE RADIOLYSIS. ,,, DOI: /S(03)X. Moris Topaz, Menachem Motiei, Ehud Assia, Dan Meyerstein, Naomi Meyerstein, Aharon by: The oxidation of some transition-metal cyanide compounds by hydroxyl radical in aqueous media has been investigated by pulse radiolysis. For compounds of the type, M(CN)64− where M is Fe, Ru, and O.
The radiolysis of aqueous KCN is also studied for making a comparison of the radiolysis behavior between cyanide ions and undissociated HCN. I. INTRODUCTION In the past ten years, many studies have been successfully carried out on the determination of the kinetic behavior and radiolytic yield in the radiolysis of many compounds in aqueous solution. However little attention has been paid to the. Cyano metal complexes contain one or more bound cyanide ligands, CN −, and constitute one of the largest and longest‐known classes of compounds in inorganic carbon monoxide, the cyanide ion can function as a π‐acid ligand, but because of its negative charge, the cyanide ion can also form strong sigma bonds. Pulse radiolysis has been used to study the transient formation and decomposition of cobalt–alkyl bonds in aqueous solution in the same manner as it has been used for chromium alkyls. In general for all of these metal–alkyl bond homolysis reactions of the aquo complexes, steric hindrance facilitates the reaction. Oxygen-free aqueous solutions of hydrogen cyanide, M and pH∼6, were exposed to gamma rays from a60Co source, the mixture of nonvolatile products was fractionated and the fractions were analysed. It has been found that the complex mixture contains oligomers and polymers with molecular weights up to 20, daltons, mainly polyamides with urea and peptidic fragments.
Pulse radiolysis of aqueous solution of pentacyanocobaltate(II). Detection and characterization of pentacyanocobaltate(I). A new method is described for investigating ion-binding between polyanions and their associated counterions. The reactions of hydrated electrons (e) produced during pulse radiolysis of aqueous solutions are used to examine specifically the interactions between the cationic dye methylene blue (MB) and anionic sites. The results of competition studies of the reactions of hydroxyl radicals with carbonate ion and ethanol or methanol at high concentration in nitrous-oxide- and oxygen-saturated solution at pH 11 are consistent with O – being a product of the reaction of e – aq with N 2 O, and with the equilibrium (1), OH+OH – ⇌ O – +H 2 O, (1) not being established. On this basis, rate constants for. Summary The radiolysis of aqueous solutions (O 2 -free) of HCN and NH 4 CN was examined at very large doses of 60 Co gamma radiation (up to Mrad). In this dose range the cyanide initially present ( M) is decomposed and only its radiolytic products participate in .