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July 11, 2016

naphthalene iupac name

Usually, electrophiles attack at the alpha position. In 1819–1820, at least two chemists reported a white solid with a pungent odor derived from the distillation of coal tar. Naphthalene D8 2000 microg/mL in Methyl-tert-butyl ether Exposure to naphthalene is more harmful for these people and may cause hemolytic anemia at lower doses. Sulfonation, however, gives a mixture of the "alpha" product 1-naphthalenesulfonic acid and the "beta" product 2-naphthalenesulfonic acid, with the ratio dependent on reaction conditions. For many electrophilic aromatic substitution reactions, naphthalene is more reactive than benzene, reacting under milder conditions than does benzene. Petroleum-derived naphthalene is usually purer than that derived from coal tar. Help. [1]. Humans, particularly children, have developed this condition, known as hemolytic anemia, after ingesting mothballs or deodorant blocks containing naphthalene. IUPAC Name: naphthalene . Naphthalene-d8, 99 atom % D, >=98% (CP) Naphthalene D8 1000 microg/mL in Dichloromethane. In a sealed container containing naphthalene pellets, naphthalene vapors build up to levels toxic to both the adult and larval forms of many moths that attack textiles. Find out more about the company LUMITOS and our team. 2.1.1 IUPAC Name. To use all the functions on Chemie.DE please activate JavaScript. Systematic IUPAC name. For beta substitution, the intermediate has only six resonance structures, and only two of these are aromatic. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE. In North America, coal tar producers are Koppers Inc. and Recochem Inc., and petroleum-derived produer is Advanced Aromatics, L.P.. Help. Naphthalene IUPAC name: Naphthalene Other names Tar Camphor, White Tar, Moth Flakes Identifiers CAS number: 91-20-3: RTECS number: QJ0525000 SMILES: c1cccc2c1cccc2: Properties Molecular … Substance identity Substance identity. For example, whereas both benzene and naphthalene react with chlorine in the presence of a ferric chloride or aluminium chloride catalyst, naphthalene and chlorine can react to form 1-chloronaphthalene even without a catalyst. Oxidation with chromate or permanganate, or catalytic oxidation with O2 and a vanadium catalyst, gives phthalic acid. This oil, after being washed with aqueous sodium hydroxide to remove acidic components (chiefly various phenols), and with sulfuric acid to remove basic components, is fractionally distilled to isolate naphthalene. Like benzene, naphthalene can undergo electrophilic aromatic substitution. ... Search for: naphthalene . A naphthalene molecule is composed of two fused benzene rings. Preferred IUPAC name. Naphthalene-1-sulphonic acid. The chief impurity is the sulfur-containing aromatic compound benzothiophene. Exposure to large amounts of naphthalene may cause nausea, vomiting, diarrhea, blood in the urine, and jaundice (yellow coloration of the skin). A naphthalene molecule can be viewed as the fusion of a pair of benzene rings. © 1997-2020 LUMITOS AG, All rights reserved, https://www.chemeurope.com/en/encyclopedia/Naphthalene.html, Your browser is not current. CAS Number: 91-20-3 . It is volatile, forming a flammable vapor, and readily sublimes at room temperature. Unlike highly-symmetrical aromatics, such as benzene, the carbon-carbon bonds in naphthalene are not of the same length. In industrial practice, distillation of coal tar yields an oil containing about 50% naphthalene, along with a variety of other aromatic compounds. As such, naphthalene is classified as a benzenoid polycyclic aromatic hydrocarbon (PAH). Decahydronaphthalene (the fully saturated analog of naphthalene). Similarly, while both benzene and naphthalene can be alkylated using Friedel-Crafts reactions, naphthalene can also be alkylated by reaction with alkenes or alcohols, with sulfuric or phosphoric acid as the catalyst. Where required, crude naphthalene can be further purified by recrystallization from any of a variety of solvents, resulting in 99% naphthalene by weight, refered to as 800C (melting point). All Rights Reserved, Naphthalene, crude or refined [UN1334] [Flammable solid], Naphthalene, crude or refined [UN1334] [Flammable solid], Naphthalene, molten [UN2304] [Flammable solid], Naphthalene, molten [UN2304] [Flammable solid]. (In organic chemistry, rings are fused if they share two or more atoms.) New Window. The structure of two fuse… 218 °C Alfa Aesar: 424 F (217.7778 °C) NIOSH QJ0525000 218 °C OU Chemical Safety Data (No longer updated) More details: 218 °C Alfa Aesar A13188, 33347: 218 °C Oakwood 240561: 218 °C LabNetwork LN00194168: 218 °C FooDB FDB000954: 423-425 F / 760 mmHg (217.2222-218.3333 °C / 760 mmHg) Wikidata Q179724 424 F / 760 mmHg (217.7778 °C / 760 mmHg) Wikidata Q179724 The bonds C1–C2, C3–C4, C5–C6 and C7–C8 are about 1.36 Å (136 pm) in length, whereas the other carbon-carbon bonds are about 1.42 Å (142 pm) long. Over 400 million people have an inherited condition called glucose-6-phosphate dehydrogenase deficiency. 2.1.2 InChI. Exposure to large amounts of naphthalene may damage or destroy red blood cells. The hydrogenated naphthalenes tetrahydronaphthalene (tetralin) and decahydronaphthalene (decalin) are used as low-volatility solvents. Naphthaline's chemical formula was determined by Michael Faraday in 1826. Isotopologues: Naphthalene-D8 Naphthalene. EINECS 214-552-7. Naphthalene vapour can also slow the onset of rust[citation needed], such as the use of moth balls in a tool box. In 1821, John Kidd described many of this substance's properties and the means of its production, and proposed the name naphthaline, as it had been derived from a kind of naphtha (a broad term encompassing any volatile, flammable liquid hydrocarbon mixture, including coal tar). While the composition of coal tar varies with the coal from which it is produced, typical coal tar is about 10% naphthalene by weight. Naphthalene can be hydrogenated under high pressure with metal catalysts to give 1,2,3,4-tetrahydronaphthalene or tetralin (C10H14). Naphthalene's most familiar use is as a household fumigant, such as in mothballs (although 1,4-dichlorobenzene (or p-dichlorobenzene) is now more widely used). Your browser does not support JavaScript. In 1821, John Kidd described many of this substance's properties and the means of its production, and proposed the name naphthaline, as it had been derived from a kind of naphtha (a broad term encompassing any volatile, flammable liquid hydrocarbon mixture, including coal tar). (In organic chemistry, rings are fused if they share two or more atoms.) It is best known as the main … In the past, naphthalene was administered orally to kill parasitic worms in livestock. Further hydrogenation yields decahydronaphthalene or decalin (C10H18). Find out how LUMITOS supports you with online marketing. [1] Naphthaline's chemical formula was determined by Michael Faraday in 1826. Naphthalene-D8 >98.0 Atom % D. AKOS015903735. In 1819–1820, at least two chemists reported a white solid with a pungent odor derived from the distillation of coal tar. Perdeuterated naphthalene. Categories: Hydrocarbons | Simple aromatic rings | Antiseptics | Aromatic compounds. IUPAC Standard InChIKey: UFWIBTONFRDIAS-UHFFFAOYSA-N; CAS Registry Number: 91-20-3; Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file The 3d structure may be viewed using Java or Javascript. Naphthalene D8 10 microg/mL in Cyclohexane. The structure of two fused benzene rings was proposed by Emil Erlenmeyer in 1866,[2] and confirmed by Carl Graebe three years later. Computed by LexiChem 2.6.6 (PubChem release 2019.06.18) PubChem. Accordingly, naphthalene is classified as a benzenoid polycyclic aromatic hydrocarbon (PAH). J-003121. Bicyclo[4.4.0]deca-1,3,5,7,9-pentaene. The IUPAC nomenclature is a systematic way of naming chemical substances, both organic and inorganic. To use all functions of this page, please activate cookies in your browser. DTXSID10894058. Naphthalenes substituted with combinations of strongly electron-donating functional groups, such as alcohols and amines, and strongly electron-withdrawing groups, especially sulfonic acids, are intermediates in the preparation of many synthetic dyes. Symptoms include fatigue, lack of appetite, restlessness, and pale skin. Read what you need to know about our industry portal chemeurope.com. 2-ethoxynaphthalene. The carbon atoms in the chemical structure of naphthalene are …

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