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Date: 8-9-2020
1722
Date: 17-9-2020
1214
Date: 12-7-2018
1405
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As with the alcohols, the phenolic hydroxyl hydrogen is rather easily replaced by other substituents. For example, phenol reacts easily with acetic anhydride to give phenyl acetate. Likewise, the phenolate anion is an effective nucleophile in SN2 reactions, as in the second example below.
C6H5–OH + (CH3CO)2O C6H5–O–COCH3 + CH3CO2H
C6H5–O(–) Na(+) + CH3CH2CH3–Br C6H5–O–CH2CH2CH3 + NaBr
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علامات بسيطة في جسدك قد تنذر بمرض "قاتل"
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أول صور ثلاثية الأبعاد للغدة الزعترية البشرية
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مستشفى العتبة العباسية الميداني في سوريا يقدّم خدماته لنحو 1500 نازح لبناني يوميًا
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