Results 241 to 250 of about 106,125 (294)

Nitrone Formation by Reaction of an Enolate with a Nitro Group

Organic Letters, 2021
Ketones with a 2-nitrophenyl group at the α-position were treated with sodium hydroxide in methanol at 60 °C. Under these conditions, enolates derived from the ketones intramolecularly reacted with the nitro group to form a variety of nitrones. Additional experimental results, including the unexpected isolation of N-hydroxyindolinone as a byproduct ...
Hiroaki Shimizu, Kohei Yoshinaga, Satoshi Yokoshima   +2 more
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Torsion of the nitro group in nitroethylene

Journal of Molecular Spectroscopy, 1973
Abstract Eight NO 2 -torsional transition frequencies obtained from interferometric far infrared measurements are reported. These data provide accurate information on the potential function for torsional angles up to 50°. The potential parameters are V 2 = 1642.7 ± 3.9 cm −1 and V 4 = −88.0 ± 1.7 cm −1 for a rigid frame/rigid top model and V
R. Meyer, A. Gammeter, P. Smith, H. Kühne, P. Nösberger, Hs. Günthard   +5 more
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Origin of the nitro group of azomycin

Biochimica et Biophysica Acta (BBA) - General Subjects, 1966
Abstract The origin of the nitro group of the antibiotic azomycin (2-nitroimidazole) has been investigated. Addition of 2-aminoimidazole to cultures of an azomycin-producing Streptomyces strain resulted in increased azomycin yields. When [2-14C]2-aminoimidazole was added to the cultures of the Streptomyces more than 50% of the radioactivity was ...
G.C. Lancini, D. Kluepfel, E. Lazzari, G. Sartori   +3 more
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The nitro group as an intramolecular nucleophile

Journal of the Chemical Society, Chemical Communications, 1980
The highly stereoselective, regiospecific bromination of two norbornenyl systems containing an endo-nitro group proceeds with nitro group participation; an X-ray crystal structure determination of product (3a) is reported.
Norman F. Blom, Duncan M. F. Edwards, John S. Field, Joseph P. Michael   +3 more
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Replacement of the nitro group by hydrogen

Journal of the American Chemical Society, 1978
Die Titelreaktion gelingt mit dem Na-Salz von Methylmercaptan (II); aus der Nitroverbindung (I) werden so die Produkte (III) erhalten.
Nathan Kornblum, Stephen C. Carlson, Ronald G. Smith   +2 more
openaire   +1 more source

Protonated nitro group: structure, energy and conjugation

Organic & Biomolecular Chemistry, 2005
Structure of protonated nitro compounds was investigated by calculations at the levels MP2(FC)/6-311++G(2d,2p)//MP2(FC)/6-311++G(2d,2p)(nitromethane and reference compounds) or B3LYP/6-311+G(d,p)//B3LYP/6-311+G(d,p)(nitrobenzene and its 18 meta- and para-substituted derivatives).
Otto, Exner, Stanislav, Böhm
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Nitro-Group-Directed Selective Deacylation and Desulfonation

Synthesis, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Xiujie Ji, Chunbao Li
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Facile conversion of a coordinated nitro group into an aqua group: acid-induced nitro-to-nitrito rearrangement

Inorganic Chemistry, 1987
The nitro complex (NH/sub 3/)/sub 5/CoNO/sub 2//sup 2 +/ reacts rapidly and completely with neat anhydrous trifluoromethanesulfonic acid to generate the aqua species (NH/sub 3/)/sub 5/CoOH/sub 2//sup 3 +/. Oxygen-17 NMR results show that the oxygen in the bound water is derived from the original nitro group.
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The nitro group as substituent

Chemical Society Reviews, 1996
Otto Exner, Tadeusz Marek Krygowski
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The Nitro Group

1991
Daimay Lin-Vien, Norman B. Colthup, William G. Fateley, Jeanette G. Grasselli   +3 more
openaire   +1 more source