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Date: 26-7-2019
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Date: 1-8-2018
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Date: 23-8-2019
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The direct reaction of a carboxylic acid with an amine would be expected to be difficult because the basic amine would deprotonate the carboxylic acid to form a highly unreactive carboxylate. However when the ammonium carboxylate salt is heated to a temperature above 100 oC water is driven off and an amide is formed.
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تحذير من "عادة" خلال تنظيف اللسان.. خطيرة على القلب
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دراسة علمية تحذر من علاقات حب "اصطناعية" ؟!
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العتبة العباسية المقدسة تحذّر من خطورة الحرب الثقافية والأخلاقية التي تستهدف المجتمع الإسلاميّ
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