dinitrobenzène — ● dinitrobenzène nom masculin Dérivé dinitré du benzène C6H4(NO2)2. (L isomère méta est employé dans l industrie des explosifs et dans celle des colorants.) … Encyclopédie Universelle
dinitrobenzene — [dī nī΄trō ben′zēn΄] n. any of three isomeric compounds, C6H4 (NO2) 2, formed by the reaction of nitric acid and benzene or nitrobenzene: used in dyes, organic synthesis, etc … English World dictionary
dinitrobenzene — noun Etymology: International Scientific Vocabulary Date: 1873 any of three isomeric toxic compounds C6H4(NO2)2 … New Collegiate Dictionary
dinitrobenzene — noun Any of three isomeric aromatic nitro compounds CH(NO) formed by the nitration of benzene; they are used in the manufacture of dyes etc … Wiktionary
dinitrobenzene — di·ni·tro·ben·zene .dī .nī trō ben .zēn, ben n any of three isomeric toxic derivatives C6H4(NO2)2 of benzene * * * di·ni·tro·ben·zene (di ni″tro benґzēn) a poisonous substance, C6H4(NO2)2, whose fumes may cause breathlessness and… … Medical dictionary
dinitrobenzene — di•ni•tro•ben•zene [[t]daɪˌnaɪ trəˈbɛn zin, bɛnˈzin[/t]] n. chem. any of three benzene derivatives with the formula C6H4NO2 • Etymology: 1870–75 … From formal English to slang
dinitrobenzene — /daɪˌnaɪtroʊˈbɛnzin/ (say duy.nuytroh benzeen), / bɛnˈzin/ (say ben zeen) noun one of three isomeric compounds, C6H4(NO2)2, the most important of which is made by nitration of benzene or nitrobenzene and used in the manufacture of azo dyes. dinitrobenzene — (ˌ)dī|nī.trō+ noun Etymology: International Scientific Vocabulary dinitro + benzene. any of three isomeric toxic crystalline compounds C6H4(NO2)2 formed by nitration of benzene or nitrobenzene; especially. the yellow meta isomer used chiefly as … Useful english dictionary 1,3-dinitrobenzène — Général Nom IUPAC 1,3 dinitrobenzène Synonymes m dinit … Wikipédia en Français
dinitrobenzene — (ˌ)dī|nī.trō+ noun Etymology: International Scientific Vocabulary dinitro + benzene. any of three isomeric toxic crystalline compounds C6H4(NO2)2 formed by nitration of benzene or nitrobenzene; especially. the yellow meta isomer used chiefly as … Useful english dictionary
1,3-dinitrobenzène — Général Nom IUPAC 1,3 dinitrobenzène Synonymes m dinit … Wikipédia en Français
Received 21 November 1995. Accepted 10 April 1996. Available online 24 March 1998.Abstract
The sites of aniline and m -dinitrobenzene simultaneously absorbed by NaY were studied by neutron powder diffraction. Selective deuteration of the molecules allows concise identification of the guests. These are stacked alternating along a threefold axis of spacegroup Fd—m. UV diffuse reflectance spectrometry gives evidence of a charge transfer interaction between aniline and dinitrobenzene. The investigation of a sample containing two molecules of aniline per supercage yielded identical adsorption positions to those obtained in combination with dinitrobenzene.Keywords
Copyright © 1997 Published by Elsevier B.V.Citing articles ( )
Additional Names: 2,4-Dinitro-1-fluorobenzene; DNFB; FDNB; Sanger's reagent
Molecular Formula: C 6 H 3 FN 2 O 4
Molecular Weight: 186.10
Percent Composition: C 38.72%, H 1.62%, F 10.21%, N 15.05%, O 34.39%
Literature References: Prepn: A. F. Holleman, J. W. Beekman, Rec. Trav. Chim.23, 225 (1904); Cook, Saunders, Biochem. J.41, 558 (1947). Use in peptide analysis: Sanger, Biochem. J.39, 507 (1945); 40, 261 (1946); 45, 563 (1949); Porter, Sanger, ibid.42, 287 (1948). Tumor promoting activity: F. G. Bock et al.,Cancer Res.29, 179 (1969). Mutagenicity study: D. R. Jagannath et al.,Mutat. Res.78, 91 (1980). Review of uses: Reagents for Organic Synthesis, L. F. Fieser, M. Fieser, Eds. (Wiley, New York, 1967) pp 321-322.
Properties: Pale yellow crystals from ether, mp 26°. bp 2.0 137°. Sol in benzene, ether, propylene glycol.
Melting point: mp 26°
Boiling point: bp 2.0 137°
CAUTION: Vesicant. For proper handling see: J. S. Thompson, O. P. Edmunds, Ann. Occup. Hyg.23, 27 (1980).
Use: Reagent for labeling a terminal amino acid group; in modified Wohl degradations of aldoses. As hapten.
Dinitrobenzenes are chemical compounds composed of a benzene ring and two nitro group (-NO2 ) substituents. The three possible arrangements of the nitro groups afford three isomers. 1,2-dinitrobenzene, 1,3-dinitrobenzene, and 1,4-dinitrobenzene. Each isomer has the chemical formula C6 H4 N2 O4 and a molar mass of about 168.11 g/mol. 1,3-Dinitrobenzene is the most common isomer and it is used in the manufacture of explosives .Properties
The dinitrobenzenes are all crystalline solids. The boiling points of the three isomers are relatively close; however, the melting points significantly differ. 1,4-Dinitrobenzene, which has the highest symmetry, has the highest melting point.Preparation
1,3-Dinitrobenzene is accessible by nitration of nitrobenzene. The reaction proceeds under acid catalysis using sulfuric acid. The directing effect of the nitro group of nitrobenzene leads to 93% of the product resulting from nitration at the meta -position. The ortho - and para -products occur in only 6% and 1%, respectively. [ 8 ]
The fucosyltransferase-catalyzed 5-thiofucosylation reaction suffered from limitations in the Î²-selective synthesis of GDP-5-thiofucose, a donor substrate. We found that the use of electronegatively-substituted benzoate groups for 5-thiofucose protection improved the Î²-selectivity in the phosphorylation step. We thus achieved the synthesis of 5-thio-Î²-L-fucosyl phosphate in 50% yield from 5-thiofucose, using the 3,5-dinitrobenzoyl group.
The article discusses the use of Î²-diphenylphosphorylated ketones as general approach to synthesis. It states that ketones or organophosphorus compounds were obtained for the first time through Conant reaction by reacting chlorodiphenylphosphine (CDPP) with chalcones in glacial acetic acid.
Phosphorylation of secondary hydroxy groups in per-6- O-( tert-butyldimethylsilyl)-Î²-cyclodextrin with a phosphorous diamidoester is found to proceed, unlike phosphorylation of free Î²-cyclodextrin, at an elevated temperature and is accompanied by substantial desilylation.
Synthesis and application of phosphorylated esters, alcohols, ketones, epoxides, carbamates and carbamides, amino acids, and pyrimidines is reviewed.
New acetal-like and phosphacyclic lipids were synthesized on the basis of 2-hydroxymethyl-2-propylpropane-1,3-diol. The initial triol was initially treated with higher aldehydes to obtain the corresponding acetals, which were phosphorylated with chlorobis(diethylamino)phosphine. Intermediate.
The use of novel general halogen-free methodology for the synthesis of phosphines, phosphine chalcogenides, and phosphinic acids from elemental phosphorus and alkenes and alkynes in the superbase suspensions is described.
2-(Diphenylphosphino)benzoic acid, isolated as the ester, was obtained by the photostimulated reaction of 2-chlorobenzoate ion with Ph2P- ions in good yield in liquid ammonia. The reaction did not occur in the dark; it was inhibited by m-dinitrobenzene and partially inhibited by a radical trap.
Tetrabutylammonium bromide (TBAB) was used as a green catalyst for the synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3-d]pyrimidinone derivatives in water as a solvent. Use of nontoxic reaction components, short reaction times, easy work-up and high yields are some important advantages of.
Ultrasound promoted mild one-pot multicomponent synthesis of 3,4-dihydropyrano[c]chromenes from 4-hydroxycoumarin, arylaldehydes and malononitrile was achieved in aqueous media. The methodology promises advantages of short reaction times, environmentally benign conditions, high yields, and.
Acenaphthenequinone reacted with diazofluorene, diphenyldiazomethane, phenybenzoyldiazomethane, phenacyl chloride, o-nitrobenzyl chloride, and diazohydroindenedione to give new oxadiazole, ketoepoxide and dioxadiazepine derivatives. They reacted with triphenylphosphine and triethylphosphite to.
Any of three isomeric compounds, C6 H4 (NO2 )2. made from a mixture of nitric acid, sulfuric acid, and heated benzene and used in celluloid manufacture, in dyes, and in organic synthesis.dinitrobenzene
(Elements & Compounds) a yellow crystalline compound existing in three isomeric forms, obtained by reaction of benzene with nitric and sulphuric acids. The meta- form is used in the manufacture of dyes and plastics. Formula: C6H4(N02)2di•ni•tro•ben•zene
(daɪˌnaɪ trəˈbɛn zin, -bɛnˈzin)
any of three benzene derivatives with the formula C6 H4 NO2.
References in periodicals archive ?
05) benefit in the Wistar rat model of dinitrobenzene sulfonic acid (DNBS) induced colitis, a preclinical model widely used by the pharmaceutical industry and academia to test agents as potential treatments for UC.
The cyclopentenone prostaglandin 15-deoxy-delta(12,14)-PGJ2 attenuates the development of colon injury caused by dinitrobenzene sulphonic acid in the rat.
05) benefit in the Wistar rat model of dinitrobenzene sulfonic acid (DNBS) induced colitis, a preclinical model widely used in industry and academia to test agents as potential treatments for ulcerative colitis.
The directing effect of. Preparation. 1,3-Dinitrobenzene is accessible by nitration of nitrobenzene. P-Dinitrobenzene Benzene, the bank reaction proceeds under acid catalysis using sulfuric internet acid. P-dinitro-E. A novel method for the regioselective synthesis of 4-halo ortho-dinitrobenzene derivatives was freecreditreportacess developed by reacting various meta-halo nitrobenzenes with urea n. Starkey; Published Online. B. Methods - Synthesis Techniques Organic Syntheses Abstract; database tools.P dinitrobenzene synthesis
M-Dinitrobenzene. Min. Order: 0. FOB Price: 0.0 /0.0. Simagchem, your partner in China as a premier supply of bulk specialty chemicals for industry and life science. Synthesis of nitrobenzene 1 for there may be a residue of m-dinitrobenzene or higher pale yellow liquid, B.P. 210 C. (1) Nitrobenzene is appreciably. Find quality suppliers and manufacturers of p-dinitrobenzenefor price inquiry. Where to buy so offer free database is used in organic synthesis. 1-fluoro-2,4-dinitrobenzene, or Sanger s reagent (commonly called dinitrofluorobenzene or dnfb is a chemical used for polypeptide sequencing. Contents 1 Preparation). Organic and Inorganic Practical Chemistry - Prof. Amrut Gaddamwar Prof. P. R. Rajput - Textbook Chapter 1 Organic synthesis 1.1 Preparation of m-Dinitrobenzene. Structure, properties, spectra, suppliers and links for: 1,4-Dinitrobenzene. how to assign letter to external hard drive windows 7
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ALS Environmental may or may not test for 1,3-Dinitrobenzene (CAS # 99-65-0). Information is subject to change; please contact us for the latest available analytes for which we test.
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CAS Number or ID: 99-65-0
EC Number (EINECS): 99-65-0
Synonyms: Benzene, m-dinitro-;m-Dinitrobenzene;1,3-Dinitrobenzene;Binitrobenzene;2,4-Dinitrobenzene;Dwunitrobenzen;1,3-Dinitrobenzol;UN 1597
Use: Synthetic intermediate
Apearance: orange to yellow crystalline powder
Melting Point: 88 - 90 C
Boiling Point: 297 C
Flash Point: 150 C (closed cup)
Water Solubility: negligible
Stability: Stable. Incompatible with reducing agents, oxidizing agents, strong bases. May explode if heated.
Laboratory tests that may be available by ALS - Columbia for 1,3-Dinitrobenzene (CAS # 99-65-0) :