• reaction
  • Furthermore, charged species such as carbocations, carbanions, conjugate acids and conjugate bases are often intermediates on the reaction path, the overall transformation taking place in two or more discrete steps. (msu.edu)
  • The heterogeneous reaction of nitric oxide (NO) and water produces nitrous acid. (wikipedia.org)
  • Ethyl cyanohydroxyiminoacetate is obtained in the reaction of ethyl cyanoacetate and nitrous acid (from sodium nitrite and acetic acid) in 87% yield. (wikipedia.org)
  • Because of the rapid hydrolysis of the ester, the reaction should be carried out at pH 4.5, in buffered phosphoric acid the product can even be obtained in virtually quantitative yield. (wikipedia.org)
  • N2 + O2 + Cl2 → 2 NOCl ⇌ 2 NO + Cl2 NOCl also arises from the combination of hydrochloric and nitric acids according to the following reaction: HNO3 + 3 HCl → Cl2 + 2 H2O + NOCl In nitric acid, NOCl is readily oxidized into nitrogen dioxide. (wikipedia.org)
  • With halide acceptors, for example antimony pentachloride, converts to nitrosonium salts: NOCl + SbCl5 → [NO]+[SbCl In a related reaction, sulfuric acid gives nitrosylsulfuric acid, the mixed acid anhydride of nitrous and sulfuric acid: ClNO + H2SO4 → ONHSO4 + HCl NOCl reacts with silver thiocyanate to give silver chloride and the pseudohalogen nitrosyl thiocyanate: ClNO + AgSCN → AgCl + ONSCN Nitrosyl chloride is used to prepare metal nitrosyl complexes. (wikipedia.org)
  • Of the benzene derivatives that do not undergo the Baudisch reaction, aromatic aldehydes tend to form hydroxamic acid or oximes. (wikipedia.org)
  • Konecny proposed that instead of the nitroso group adding first followed by the addition of a hydroxyl group as Baudisch predicted, the OH group added first through a similar radical mechanism with the hydroxyl radical coming from Hydrogen Peroxide after which the nitroso group is added by nitrous acid which he proposed was an intermediate under the reaction conditions. (wikipedia.org)
  • They maintained that the nitrosation of a phenol (as Konecny's mechanism posed) through the intermediate nitrous acid was impossible under the reaction conditions because it would involve an ortho substitution of a phenol which is thermodynamically unfavorable which was the reason Konecny observed very low percent yields. (wikipedia.org)
  • The Barton Reaction involves a homolytic RO-NO cleavage, followed by δ-hydrogen abstraction, free radical recombination, and tautomerization to form an oxime. (wikipedia.org)
  • The unusual alkyl nitrite starting material of the Barton reaction is prepared by attack of an alcohol on a nitrosylium cation generated in situ by dehydration of doubly protonated nitrous acid. (wikipedia.org)
  • Alkyl nitrites are prepared by the reaction of alcohols with nitrous acid: ROH + HONO → RONO + H2O, where R = alkyl group The reaction is called esterification. (wikipedia.org)
  • Nitroxyl rapidly decomposes by a bimolecular pathway to nitrous oxide (k(298K) = 8 x 106 M1s1): 2 HNO → N2O + H2O The reaction proceeds via dimerizes to hyponitrous acid, H2N2O2, which subsequently undergoes dehydration. (wikipedia.org)
  • At 120 °C, hydroxylammonium sulfate begins to decompose to sulfur trioxide, nitrous oxide, water, and ammonia: 2(NH3OH)2SO4 → 2SO3 + N2O + 2NH3 + 5H2O The reaction is exothermic above 138 °C, and is most exothermic at 177 °C. Metals (especially copper, its alloys and its salts) catalyse the decomposition of hydroxylammonium sulfate. (wikipedia.org)
  • nitric acid
  • I2 + 2 e− ⇌ 2 I− {Eo = +0.54 V} NO3− + 3 H+ + 2 e− ⇌ HNO2 + H2O {Eo = +0.93 V} HNO2 + H+ + e− ⇌ NO + H2O {Eo = +0.98 V} It can be seen that the values of Ecello for these reactions are similar, but nitric acid is a more powerful oxidizing agent. (wikipedia.org)
  • Base on the fact that dilute nitrous acid can oxidize iodide into iodine, it can be deduced that nitrous is a faster, rather than a more powerful, oxidizing agent than dilute nitric acid. (wikipedia.org)
  • Demjanov rearrangement Nitric acid (HNO3) Tiffeneau-Demjanov rearrangement Greenwood, Norman N. (wikipedia.org)
  • The name nitrogène was suggested by French chemist Jean-Antoine-Claude Chaptal in 1790, when it was found that nitrogen was present in nitric acid and nitrates. (wikipedia.org)
  • Alchemists knew nitric acid as aqua fortis (strong water), as well as other nitrogen compounds such as ammonium salts and nitrate salts. (wikipedia.org)
  • oxide
  • We have examined these isolates for their ability to denitrify (the process of reducing nitrate or nitrite to nitrous oxide or nitrogen gas) and determined that only 5 of the 24 isolates were capable of denitrification even though the key gene of denitrificaiton (nirS or nirK) was present in 6 of the isolates. (luc.edu)
  • hydrolysis
  • citation needed] The first retrosynthesis step in the total synthesis of the vitamin was established based on the work of Bernhauer in 1960, which demonstrated that vitamin B12's "tail" could be removed and replaced (by amide hydrolysis/formation), where the product of the removal was cobyric acid. (wikipedia.org)
  • The D ring was synthesized starting from chiral (S)-camphor 8 which was converted to oxime 9 (oxidation / hydroxylamine ), then to amide 10 (hydrolysis), lactam 11 (acid-amide condensation), N-nitroso compound 12, diazo compound 13 and to cyclopentene 14 (carbene, methyl group migration). (wikipedia.org)
  • Other notable studies on the production of HNO exploit cycloadducts of acyl nitroso species, which are known to decompose via hydrolysis to HNO and acyl acid. (wikipedia.org)
  • amino acids
  • In the coupling of amino acids, frequently occurring secondary reactions largely suppressed, which would be the formation of symmetrical acid anhydrides, racemization and epimerization and the cyclization to oxazolinones or - especially for dipeptides - to 2,5-diketopiperazines. (wikipedia.org)
  • Nitrogen occurs in all organisms, primarily in amino acids (and thus proteins), in the nucleic acids (DNA and RNA) and in the energy transfer molecule adenosine triphosphate. (wikipedia.org)
  • ethyl
  • Ethyl cyanohydroxyiminoacetate (oxyma) is the oxime of ethyl cyanoacetate and finds use as an additive for carbodiimides, such as dicyclohexylcarbodiimide (DCC) in peptide synthesis. (wikipedia.org)
  • compound
  • 4. The oxime compound according to claim 3, wherein X is O or S, l is an integer of 1 or 2, and R 1 is an acyl group or an alkoxycarbonyl group, each of which may have a substituent. (patentsencyclopedia.com)
  • In crystalline form, the compound is present as an oxime, whereas it exists as a salt or in a strongly basic solution predominantly as a tautomeric nitrosoisomer in anionic form. (wikipedia.org)
  • Combining nitrosylsulfuric acid and HCl affords the compound. (wikipedia.org)
  • synthesis
  • The Woodward/Eschenmoser venture was strictly a formal synthesis, because the ultimate target was cobyric acid and tail addition was not included. (wikipedia.org)
  • conjugate
  • Nitroxyl is a weak acid, with pKa of 11, the conjugate base being the triplet state of NO-. When producing the singlet state, the pKa is closer to 23. (wikipedia.org)
  • pathway
  • 2004. Degradation pathway and generation of monohydroxamic acids from the trihydroxamate siderophore deferrioxamine B. Appl. (luc.edu)
  • nitrate
  • treatment of this oxime with acid induces the Beckmann rearrangement to give caprolactam (3): The nitrate salt, hydroxylammonium nitrate, is being researched as a rocket propellant, both in water solution as a monopropellant and in its solid form as a solid propellant. (wikipedia.org)