Nitrogen And Oxygen Centered Radicals

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Mikosch, Thomas is the author of 'Nitrogen And Oxygen Centered Radicals', published 2000 under ISBN 9783540882329 and ISBN 3540882324.
Mikosch, Thomas

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...n environmentally friendly electrochemical approach is reported that takes advantage of the captodative effect and delocalization effect to generate nitrogen‐centered radicals (NCRs) ... Tunable Electrochemical C−N ... - Wiley Online Library ... . By changing the reaction parameters of the electrode material and feedstock solubility, dearomatization enabled a selective dehydrogenative C−N versus N−N bond formation reaction. Hence, pyrido[1,2‐ Nitrogen‐Centered Radicals. Lucien Stella. Search for more papers by this author. Lucien Stella. Search for more papers by this author. Book Editor(s): Prof. Philippe Renaud. Universite de Fribourg, Institut de ... Nitrogen and Oxygen Centered Radicals: v. 26, C (Landolt ... ... . Lucien Stella. Search for more papers by this author. Lucien Stella. Search for more papers by this author. Book Editor(s): Prof. Philippe Renaud. Universite de Fribourg, Institut de Chimie Organique, Pérolles, CH‐1700 Fribourg, Switzerland. Search for more papers by this author . Prof. Mukund P. Sibi. Department of Chemistry, North Dakota State University ... An interesting example of this approach entitled ''Visible-Light-Mediated Generation of Nitrogen Centered Radicals: Transition Metal Free Hydroimination and Iminohydroxylation Cyclisation Reactions'' was published by Leonori. 4 One of the transformations described is a 5-exo-trig cyclisation of iminyl radicals to give pyrrolines without the use of a transition metal catalyst (Scheme ... Nitrogen-centered radicals (NCRs) are a versatile class of intermediates that have wide applications in the synthesis of N-containing molecules (Scheme 1 A). However, the difficulties associated with their generation have significantly thwarted their use in synthetic chemistry. In fact, established methods often rely on the homolysis of difficult-to-construct N-X bonds and require the use of ... Nitrogen and Oxygen Centered Radicals by John A. Howard, 9783540432760, available at Book Depository with free delivery worldwide. Oxygen centered radicals, formed by the photolysis of derivatives of N-hydroxy-2-thiopyridone, have been trapped by vinyl ethers.In the case of the benzoyloxy radical, smooth deoxygenation is effected by III P compounds. Evidence for the formation of the dimethyl t butylsilyloxy and of the hydroxy radical is also presented. A dominant H-atom transfer mechanism [hydrogen atom transfer (HAT) or proton-coupled electron transfer (PCET)] in the reaction of phenols with certain type of nitrogen-centered radicals [2,2-diphenyl-1-picrylhydrazyl radical (R - N 2 - N 1)] was selected by examining the conformations, singly occupied molecular orbitals (SOMOs), charge separations and spin densities in optimized transition ... Oxaziridines react with Cu(I) salts to afford products resulting from the initial formation of a nitrogen-centered radical/oxygen-centered anion pair. For an α-aryl radical, a chiral pyrrolidine ... Radical stabilization energies (RSEs) for a wide variety of nitrogen-centered radicals and their protonated counterparts have been calculated at G3(MP2)-RAD and G3B3 level. The calculated RSE values can be rationalized through the combined effects of resonance delocalization of the unpaired spin, electron donation through adjacent alkyl groups or lone pairs, and through inductive electron ... Carbon-centered, carbohydrate radicals also form from hydrogen-atom abstraction by oxygen- and sulfur-centered radicals as well as by bromine and chlorine atoms. Differences in reactivity of hydrogen atoms in the same molecule do exist, but since such abstraction would involve two atoms of the same type, any selectivity observed would be regioselectivity, which is discussed in Chapter 10. The most common radical in the lower atmosphere is molecular dioxygen. Photodissociation of source molecules produces other radicals. In the lower atmosphere, important radical are produced by the photodissociation of nitrogen dioxide to an oxygen atom and nitric oxide (see eq. 1. 1 below), which plays a key role in smog formation—and the photodissociation of ozone to give the excited oxygen ......