Video: Phenols txawv li cas ntawm cawv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cawv yog ib qho organic compound uas nws cov molecule muaj ib lossis ntau pawg hydroxyl uas txuas ntxiv rau cov pa roj carbon atom. Phenol , ntawm qhov tod tes, yog ib qho kev sib xyaw ua ke ntawm cov pab pawg hydroxyl sib txuas ncaj qha mus rau pawg muaj ntxhiab hydrocarbon. Cawv feem ntau tsis muaj xim thiab lawv nyob hauv lub xeev ua kua.
Piv txwv li, cawv thiab phenols yog dab tsi?
Cawv yog cov organic molecules uas muaj ib pawg hydroxyl (-OH). Phenols yog cov molecules uas muaj ib pawg -OH uas txuas ncaj qha rau lub nplhaib benzene. Piv txwv ntawm cov chav kawm ntawm cawv qhia hauv qab no. Vim cawv muaj ib pawg -OH, lawv muaj peev xwm tsim hydrogen bonds rau. ib leeg.
Tsis tas li ntawd, vim li cas phenols muaj acidic dua li cawv? Phenol yog acidic ntau dua li cawv vim stabilization ntawm phenoxide ion los ntawm resonance. Kev tshwm sim ntawm electron tshem tawm pab pawg ua kom cov acidity ntawm phenol los ntawm, stabilizing phenoxide ion thaum muaj hluav taws xob tso tawm pab pawg txo qis acidity ntawm phenol los ntawm destabilizing phenoxide ion.
Cov lus nug tseem yog, puas yog phenol ib qho cawv thib ob?
Yog tias cov pa roj carbon monoxide no txuas rau ob lwm cov carbons, nws yog a theem nrab (2o) cawv . Yog tias nws txuas nrog peb lwm cov carbons, nws yog tertiary (3o) cawv . Thaum cov pab pawg hydroxyl txuas ncaj qha rau lub nplhaib benzene, qhov sib xyaw ua ke yog cais raws li a phenol.
Puas yog phenol yog cawv?
Phenols muaj cov khoom tshwj xeeb thiab tsis raug cais raws li cawv . Lawv muaj cov acidity ntau dua vim yog lub nplhaib aromatic nruj coupling nrog cov pa thiab ib tug kuj xoob daim ntawv cog lus ntawm cov pa thiab hydrogen.
Pom zoo:
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