Qhov sib txawv tseem ceeb ntawm cresol thiab phenol yog tias cresol muaj lub nplhaib benzene hloov nrog ib pawg hydroxyl thiab methyl pawg, whereas phenol muaj lub nplhaib benzene hloov nrog ib pawg hydroxyl.
Ob leeg cresol thiab phenol yog cov organic tebchaw uas muaj ntxhiab vim muaj lub nplhaib benzene. Muaj ib pawg hydroxyl (-OH) nyob rau hauv ob qho tib si qauv.
Cresol yog dab tsi?
Kresol yog ib qho organic compound uas muaj cov tshuaj formula HO-C
6H4-CH3Txij li thaum nws muaj phenol hloov nrog ib pawg methyl, peb tuaj yeem hu nws "methylphenol" thiab. Tsis tas li ntawd, qhov sib xyaw no tuaj yeem yog ntuj lossis hluavtaws. Raws li kev hloov pauv ntawm pawg methyl, muaj peb tus qauv isomers ntawm cresol li ortho-, para- thiab meta-hloov cresol. Peb daim ntawv no tuaj yeem tshwm sim hauv tib qhov sib tov; Peb hu nws "tricresol". Feem ntau, cresol yog tau los ntawm thee tar. Cov ntaub ntawv hluavtaws yog tsim los ntawm methylation ntawm phenol. Tsis tas li ntawd, hydrolysis ntawm chlorotoluene tuaj yeem tsim cresol.
Daim duab 01: Ortho-Cresol Structure
Ntxiv mus, cresol tuaj yeem muaj nyob hauv cov khoom, kua, lossis roj theem vim tias cov ntsiab lus melting thiab boiling ntawm nws tsis deb ntawm chav tsev kub. Thaum raug huab cua ntev, qhov sib xyaw no tuaj yeem maj mam dhau oxidation. Feem ntau, cresol yog cov xim tsis muaj xim tab sis muaj cov impurities tuaj yeem ua rau xim daj lossis xim av. Tsis tas li ntawd, cresol muaj cov ntxhiab tsw zoo li cov ntxhiab tsw phenol.
Dhau li ntawd, muaj ntau yam kev siv tseem ceeb ntawm cresol. Piv txwv li, nws yog ib qho tseem ceeb raws li ib tug precursor rau cov ntaub ntawv xws li yas, tshuaj tua kab, tshuaj, thiab dyes. Txawm li cas los xij, kev nqus tau los yog noj cresol tuaj yeem ua rau muaj kev phom sij rau peb. Qee cov tshuaj lom muaj xws li khaus tawv nqaij, qhov muag, qhov ncauj, thiab caj pas. Tsis tas li ntawd, nws tuaj yeem ua rau mob plab thiab ntuav.
Phenol yog dab tsi?
Phenol yog cov organic compound uas muaj cov tshuaj formula HO-C 6 H 5 Nws yog cov qauv uas muaj ntxhiab vim nws muaj lub nplhaib benzene.. Nws tshwm sim raws li cov khoom dawb uas yog volatile. Phenol yog ib qho me me acidic compound vim muaj cov proton tshem tau ntawm pawg hydroxyl ntawm phenol. Txawm li cas los xij, peb yuav tsum tau ua tib zoo saib xyuas kom tsis txhob kub hnyiab.
Daim duab 02: Cov qauv tshuaj ntawm Phenol
Peb tuaj yeem tau txais phenol los ntawm kev rho tawm los ntawm thee tar. Txawm li cas los xij, nws tsuas yog tsim los ntawm cov khoom siv roj av. Cov txheej txheem ntau lawm yog hu ua "cumene process". Cov khoom dawb ntawm phenol no muaj cov ntxhiab tsw qab uas yog tarry. Nws yog soluble hauv dej vim nws polarity.
Phenol nyhav dhau los ua cov tshuaj tiv thaiv electrophilic vim tias cov khoom siv hluav taws xob ib leeg ntawm cov pa atom tau pub rau lub nplhaib qauv. Yog li ntawd, ntau pab pawg xws li halogens, acyl pawg, sulfur-muaj pawg, thiab lwm yam tuaj yeem hloov mus rau lub nplhaib no. Phenol tuaj yeem txo qis rau benzene ntawm distillation nrog zinc plua plav.
Qhov txawv ntawm Cresol thiab Phenol yog dab tsi?
Cresol thiab phenol yog cov tshuaj tsw qab organic. Tab sis, qhov sib txawv tseem ceeb ntawm cresol thiab phenol yog tias cresol muaj lub nplhaib benzene hloov nrog ib pawg hydroxyl thiab methyl pawg, thaum phenol muaj lub nplhaib benzene hloov nrog ib pawg hydroxyl. Ntxiv mus, cresol tuaj yeem ua tau zoo, kua lossis roj nyob ntawm chav tsev kub thaum phenol yog dawb crystalline khoom.
Hauv qab infographic qhia txog qhov sib txawv ntawm cresol thiab phenol.
Summary – Cresol vs Phenol
Cresol thiab phenol yog cov tshuaj tsw qab organic. Qhov sib txawv tseem ceeb ntawm cresol thiab phenol yog tias cresol muaj lub nplhaib benzene hloov nrog ib pawg hydroxyl thiab ib pawg methyl thaum phenol muaj lub nplhaib benzene hloov nrog ib pawg hydroxyl.
