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Date: 14-7-2019
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Date: 6-7-2017
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Amide
An amide functional group is a combination of an amine group and a carbonyl group:
Amides are actually formed by bringing together an amine-containing molecule and a carboxylic acid-containing molecule. A molecule of H2O is lost, much like when an ester forms:
The bond between the N of the amine group and the C of the carbonyl group is called an amide bond. Amide bonds are particularly important in biological molecules called proteins, which are composed of strings of amino acids—molecules that have an amine group and a carboxylic acid group in them. The amine group on one amino acid reacts with the carboxylic acid group of another amino acid, making a chain held together by amide bonds. We will consider proteins later in this chapter.
Draw the structure of the amide formed by the combination of ethylamine and butanoic acid.
Solution
The structures of ethylamine and butanoic acid are:
When they come together to make an amide, an H2O molecule is lost, and the N of the amine group bonds to the C of the carboxyl group. The resulting molecule is:
Test Yourself
Draw the structure of the amide formed by the combination of methylamine and formic acid.
Answer
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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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قسم الشؤون الفكرية والثقافية يجري اختبارات مسابقة حفظ دعاء أهل الثغور
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