1 / 3

Explain why phenol reacts with NaOH while it does not react with NaHCO 3 . .

Explain why phenol reacts with NaOH while it does not react with NaHCO 3. Explain the difference in reaction of the compounds toward Lucas Reagent. Explain the difference in reaction of the compounds with chromic acid. Suggest a test reagent for Phenol. Explain your choice briefly.

chynna
Download Presentation

Explain why phenol reacts with NaOH while it does not react with NaHCO 3 . .

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Explain why phenol reacts with NaOH while it does not react with NaHCO3. . Explain the difference in reaction of the compounds toward Lucas Reagent. Explain the difference in reaction of the compounds with chromic acid. Suggest a test reagent for Phenol. Explain your choice briefly. State TWO methods for the formation of each of the alkanols A-C and phenol. Account for the browning of an apple on exposure to air for some time.

  2. Alcoholsaresolubleinwater.Analcoholhastwoparts:hydrophilic–OHgroupandhydrophobichydrocarbonpart.Thelargehydrocarboninlong-chainalcoholslimitstheaqueoussolubilityofsuchalcohols.Alcoholsaresolubleinwater.Analcoholhastwoparts:hydrophilic–OHgroupandhydrophobichydrocarbonpart.Thelargehydrocarboninlong-chainalcoholslimitstheaqueoussolubilityofsuchalcohols. • Unlikealcohol,phenolisweaklyacidicastheconjugatebaseisresonance-stabilized.However,itsacidicstrengthisstrongenoughtoneutralizeOH-butnotstrongenoughtoneutralizeNaHCO3.ItcannotliberateCO2fromHCO3-. • TertiaryalcoholsrapidlyreactwithLucasreagenttoformtertiarychloride,whichproducesimmediateturbidityinthereagent.PrimaryalcoholscannotformstableprimarycarbocationuponprotonationwithLucasreagentandthusshowveryslowornegativeLucastest.

  3. PrimaryalcoholscanbeoxidizedbyacidifiedK2Cr2O7orchromicacidtocarboxylicacid. Secondaryalcoholscanbeoxidizedtoketonewhiletertiaryalcoholscanonlybeoxidizedinsevereconditions. • Unlikealcohol,phenolgivesvioletcolorationwithneutraliron(III)chlorideasaresultofcomplexformation. • BenzenesulphonicacidreactswithNaOHat300oCtogivephenol. AnilinereactswithHNO2at0oCtogivestablearyldiazoniumsaltwhicheasilygives phenoluponhydrolysis. • Primaryandsecondaryalcohols canbeformedfromthehydrationofalkenesinacidicmedium.TheyarealsoformedrespectivelyfromaldehydeandketonebyreductionwithNaBH4.Tertiaryalcoholsareformedbythehydrolysisoftertiarychlorideatlowertemperatures.

More Related