58200-47-8Relevant academic research and scientific papers
SPIN-TRAPPING OF α-AZIDOALKYL RADICALS
Cook, Malcolm D.,Ng, Lee Len,Roberts, Brian P.
, p. 3761 - 3764 (1983)
Spin-trapping with 2-methyl-2-nitrosopropane of the α-azidoalkyl radicals derived from isopropyl and benzyl azides competes effectively with loss of nitrogen from these radicals at 313 K.
A study of the mechanism of the azidophenylselenylation of glycals
Mironov, Yu. V.,Grachev,Lalov,Sherman,Egorov,Nifantiev
scheme or table, p. 284 - 290 (2010/07/09)
Chemical and physicochemical studies of homogeneous azidophenylselenylation of glycols with diacetoxyiodobenzene, trimethylsilyl azide, and diphenyl diselenide in dichloromethane revealed that the most probable key reaction step is the formation of phenylselenyl azide, an azide radical donor. A method for azidophenylsulfenylation of glycals was proposed.
Authentic versus alternative mechanisms in spin trapping. Formation of azide spin-adducts in biphasic and non-aqueous systems by the oxidation of azide anion with a variety of hydrazyl radicals
Ionita, Petre,Gilbert, Bruce C.,Whitwood, Adrian C.
, p. 2436 - 2440 (2007/10/03)
The formation of azide spin-adducts of a number of spin-traps, including PBN, DMPO, DEPMPO and TBNB, in biphasic and organic media has been studied by EPR spectroscopy. A series of hydrazyl radicals has been employed to oxidise the azide anion to the corresponding short-lived azido radical, which is subsequently trapped. The approach has typically involved the presence of the ether 18-crown-6 in order to facilitate the transport of the azide anion from water into the organic media, with further experiments in non-aqueous systems. The results can largely be rationalised in terms of a "conventional" spin-trapping mechanism, with an efficient that depends on the relevant redox potentials, which are themselves solvent dependent; however, conditions that favour direct oxidation of the trap have also been identified. It is also established that the azide spin-adducts of some nitrones can be transformed, under certain conditions, into secondary spin-adducts by nucleophilic substitution reaction of the first-formed nitroxides.
An electron spin resonance spin trapping investigation of azide oxidation on TiO2 powder suspensions
Maldotti, Andrea,Amadelli, Rossano,Carassiti, Vittorio
, p. 76 - 80 (2007/10/02)
The oxidation of azide has been studied on TiO2 powder suspensions in water, methanol, and mixtures of the two solvents.The esr spin trapping technique has been employed to provide evidence for the formation of azidyl radicals N.3.The results show that an aqueous alkaline medium is necessary to obtain a high production of N.3 radicals.A mechanism is proposed whereby the oxidation of N-3 is mainly due to reaction with OH. radicals which are in turn generated upon capture of holes by OH- groups adsorbed on TiO2.Azidyl anions adsorb weakly on TiO2 and do not displace adsorbed OH- from the surface.
Spin trapping in heterogeneous electron transfer processes
Walter, Thomas H.,Bancroft, Eric E.,McIntire, Gregory L.,Davis, Edward R.,Gierasch, Lila M.,Blount, Henry N.
, p. 1621 - 1636 (2007/10/02)
An overview of application of spin trapping to electrochemical investigations is presented.Cited studies include characterizations of primary electrode reaction products (e.g., electrooxidations of halide and pseudohalide species, electroreduction of N-methylpyridinium ion) as well as the identification of transient intermediates arising from homogeneous reactions which are electroinitiated.The validity of spatially resolved spin trapping as a probe in the investigation of interfacial processes is demonstrated with examples drawn both from the previously reported covalent attachment of nitrone derived spin traps to silaceous surfaces and from recent studies of spin trapping in micelle and vesicle systems.Amphiphilic nitrone spin traps have been shown to coassemble with both micelles and vesicles such that the nitrone functionality resides in the interfacial region of the ordered system.The ability of these interfacially localized nitrones to trap transient radicals generated both in the hydrophobic domain of the micelle or vesicle and in the aqueous exterior domain is demonstrated.
Electron spin resonance study of spin-trapped azide radicals in aqueous solutions
Kremers, Walter,Singh, Ajit
, p. 1592 - 1595 (2007/10/02)
Organic spin traps have been used to study the formation of azide radicals during the reaction of azide anions with hydroxyl radicals.The azide radicals have been successfully trapped with three spin traps: 5,5-dimethylpyrroline-1-oxide (DMPO), phenyl-N-t
Spin trapping azidyl (N3.), cyanatyl (OCN.), cyanyl (.CN) radicals, and chlorine atom (Cl.)
Janzen, Edward G.,Stronks, Henry J.,Nutter, Dale E.,Davis, Edward R.,Blount, Henry N.,et al.
, p. 1596 - 1598 (2007/10/02)
Azidyl, cyanatyl, and cyanyl radicals and chlorine atoms have been detected by spin trapping using α-phenyl-N-tert-butyl nitrone (PBN) in the monoelectronic electrooxidations of azide, cyanate, cyanide, and chlorine.Azidyl and cyanatyl radicals were also detected with PBN in the persulfate oxidations of azide and cyanate.Azidyl radicals could be detected in the reaction of azide with hydroxyl radicals in the presence of PBN.
