Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Triphenylmethyl_radical> ?p ?o }
Showing triples 1 to 77 of
77
with 100 triples per page.
- Triphenylmethyl_radical abstract "The triphenylmethyl radical is a persistent radical and the first radical ever described in organic chemistry. It can be prepared by homolysis of triphenylmethyl chloride 1 (scheme 1) by a metal like silver or zinc in benzene or diethyl ether. The radical 2 forms a chemical equilibrium with the quinoid type dimer 3(3-triphenylmethyl-6-diphenylmethylidene-1,4-cyclohexadiene). In benzene the concentration of the radical is 2%.Solutions containing the radical are yellow and when the temperature of the solution is raised the yellow color becomes more intense as the equilibrium is shifted in favor of the radical following Le Chatelier's principle. When exposed to air the radical rapidly oxidizes to the peroxide (Scheme 2) and the color of the solution changes from yellow to colorless. Likewise, the radical reacts with iodine to triphenylmethyl iodide.The radical was discovered by Moses Gomberg in 1900. He tried to prepare hexaphenylethane from triphenylmethyl chloride and zinc in benzene in a Wurtz reaction and found that the product, based on its behaviour towards iodine and oxygen, was far more reactive than anticipated.The correct quinoid structure for the dimer was suggested as early as 1904 but this structure was soon after abandoned by the scientific community in favor of hexaphenylethane which is structure 4 in scheme 1. It subsequently took until 1968 for its rediscovery when researchers at the Vrije Universiteit Amsterdam published proton NMR data.While the trityl radical forms a quinoid dimer, derivatives thereof with the appropriate substitution pattern do form dimers with a hexaphenylethane structure. X-ray studies give a bond length of 1.67 angstrom for hexakis(3,5-di-t-butylphenyl)ethane. Theoretical calculations on a very high level of theory indicate that van-der-Waals attraction between the tert-butyl groups create a potential minimum that is absent in the unsubstituted molecule. Other derivatives have been reported as the quinoid dimer".
- Triphenylmethyl_radical thumbnail Triphenylmethylradical.png?width=300.
- Triphenylmethyl_radical wikiPageExternalLink main1.html.
- Triphenylmethyl_radical wikiPageExternalLink triphen2.htm.
- Triphenylmethyl_radical wikiPageID "4481369".
- Triphenylmethyl_radical wikiPageLength "5718".
- Triphenylmethyl_radical wikiPageOutDegree "37".
- Triphenylmethyl_radical wikiPageRevisionID "682592139".
- Triphenylmethyl_radical wikiPageWikiLink 3-triphenylmethyl-6-diphenylmethylidene-1,4-cyclohexadiene.
- Triphenylmethyl_radical wikiPageWikiLink Benzene.
- Triphenylmethyl_radical wikiPageWikiLink Category:Free_radicals.
- Triphenylmethyl_radical wikiPageWikiLink Chemical_equilibrium.
- Triphenylmethyl_radical wikiPageWikiLink Diethyl_ether.
- Triphenylmethyl_radical wikiPageWikiLink Dimer_(chemistry).
- Triphenylmethyl_radical wikiPageWikiLink Hexaphenylethane.
- Triphenylmethyl_radical wikiPageWikiLink Homolysis_(chemistry).
- Triphenylmethyl_radical wikiPageWikiLink Iodine.
- Triphenylmethyl_radical wikiPageWikiLink Le_Chateliers_principle.
- Triphenylmethyl_radical wikiPageWikiLink Molecule_of_the_Month.
- Triphenylmethyl_radical wikiPageWikiLink Moses_Gomberg.
- Triphenylmethyl_radical wikiPageWikiLink Organic_chemistry.
- Triphenylmethyl_radical wikiPageWikiLink Peroxide.
- Triphenylmethyl_radical wikiPageWikiLink Persistent_radical.
- Triphenylmethyl_radical wikiPageWikiLink Proton_NMR.
- Triphenylmethyl_radical wikiPageWikiLink Proton_nuclear_magnetic_resonance.
- Triphenylmethyl_radical wikiPageWikiLink Quinoid.
- Triphenylmethyl_radical wikiPageWikiLink Quinone.
- Triphenylmethyl_radical wikiPageWikiLink Radical_(chemistry).
- Triphenylmethyl_radical wikiPageWikiLink Silver.
- Triphenylmethyl_radical wikiPageWikiLink Triarylmethane_dye.
- Triphenylmethyl_radical wikiPageWikiLink Triphenylmethane.
- Triphenylmethyl_radical wikiPageWikiLink Triphenylmethanol.
- Triphenylmethyl_radical wikiPageWikiLink Triphenylmethyl_chloride.
- Triphenylmethyl_radical wikiPageWikiLink Triphenylmethyl_hexafluorophosphate.
- Triphenylmethyl_radical wikiPageWikiLink Triphenylmethyl_radical.
- Triphenylmethyl_radical wikiPageWikiLink VU_University_Amsterdam.
- Triphenylmethyl_radical wikiPageWikiLink Vrije_Universiteit_Amsterdam.
- Triphenylmethyl_radical wikiPageWikiLink Wurtz_reaction.
- Triphenylmethyl_radical wikiPageWikiLink Yellow.
- Triphenylmethyl_radical wikiPageWikiLink Zinc.
- Triphenylmethyl_radical wikiPageWikiLink File:TriphenylmethylRadical.png.
- Triphenylmethyl_radical wikiPageWikiLink File:Triphenylmethyl_radical_oxidation.png.
- Triphenylmethyl_radical wikiPageWikiLinkText "Triphenylmethyl radical".
- Triphenylmethyl_radical wikiPageWikiLinkText "polychlorotriphenylmethyl radicals".
- Triphenylmethyl_radical wikiPageWikiLinkText "triphenylmethyl radical".
- Triphenylmethyl_radical wikiPageWikiLinkText "triphenylmethyl".
- Triphenylmethyl_radical wikiPageWikiLinkText "trityl radical".
- Triphenylmethyl_radical hasPhotoCollection Triphenylmethyl_radical.
- Triphenylmethyl_radical imagefile "Triphenylmethylradical.png".
- Triphenylmethyl_radical imagename "Kekulé, skeletal formula of the triphenylmethyl radical".
- Triphenylmethyl_radical verifiedrevid "462238281".
- Triphenylmethyl_radical wikiPageUsesTemplate Template:Chembox.
- Triphenylmethyl_radical wikiPageUsesTemplate Template:Reflist.
- Triphenylmethyl_radical subject Category:Free_radicals.
- Triphenylmethyl_radical type Article.
- Triphenylmethyl_radical type ChemicalCompound.
- Triphenylmethyl_radical type ChemicalSubstance.
- Triphenylmethyl_radical type Article.
- Triphenylmethyl_radical type Chemical.
- Triphenylmethyl_radical type Substance.
- Triphenylmethyl_radical type ChemicalObject.
- Triphenylmethyl_radical type Thing.
- Triphenylmethyl_radical type Q11173.
- Triphenylmethyl_radical comment "The triphenylmethyl radical is a persistent radical and the first radical ever described in organic chemistry. It can be prepared by homolysis of triphenylmethyl chloride 1 (scheme 1) by a metal like silver or zinc in benzene or diethyl ether. The radical 2 forms a chemical equilibrium with the quinoid type dimer 3(3-triphenylmethyl-6-diphenylmethylidene-1,4-cyclohexadiene).".
- Triphenylmethyl_radical label "Triphenylmethyl radical".
- Triphenylmethyl_radical sameAs Radicale_trifenilmetile.
- Triphenylmethyl_radical sameAs m.0c4w0n.
- Triphenylmethyl_radical sameAs Трифенилметил.
- Triphenylmethyl_radical sameAs Trifenilmetil_radikal.
- Triphenylmethyl_radical sameAs Trifenilmetil_radikal.
- Triphenylmethyl_radical sameAs Трифенілметил.
- Triphenylmethyl_radical sameAs Q2448436.
- Triphenylmethyl_radical sameAs Q2448436.
- Triphenylmethyl_radical sameAs 三苯甲基自由基.
- Triphenylmethyl_radical wasDerivedFrom Triphenylmethyl_radical?oldid=682592139.
- Triphenylmethyl_radical depiction Triphenylmethylradical.png.
- Triphenylmethyl_radical isPrimaryTopicOf Triphenylmethyl_radical.