Concept explainers
(a)
Interpretation: The glycosidic linkages of the stachyose are to be labeled.
Concept introduction: Monosaccharides are the small units of simple sugars. Polysaccharides are made up of small units of monosaccharides. These small units are joined together by glycoside linkage.
(b)
Interpretation: Each glycosidic linkages of the stachyose are to be classified as
Concept introduction: Monosaccharides are the small units of simple sugars. Polysaccharides are made up of small units of monosaccharides. These small units are joined together by glycoside linkage.
(c)
Interpretation: The products formed on hydrolysis of stachyose are to be predicted.
Concept introduction: Glycosidic linkages are hydrolyzed in presence of acid to form cyclic hemiacetal and corresponding alcohol. Acetals in the presence of acid undergo hydrolysis to form cyclic hemiacetals.
(d)
Interpretation: The validation to the corresponding fact that whether stachyose is reducing sugar or not is to be stated.
Concept introduction: The reducing sugars contain hemiacetal and they undergo mutarotation. These sugars are in equilibrium with cyclic monosaccharide forms.
(e)
Interpretation: The product formed on treatment of stachyose with excess
Concept introduction: The hydroxyl groups of monosaccharides are converted into the ether groups in presence of base and
(f)
Interpretation: The product formed on treatment of product in (e) with
Concept introduction: Glycosidic linkages are hydrolyzed in presence of acid to form cyclic hemiacetal and corresponding alcohol. Acetals in the presence of acid undergo hydrolysis to form cyclic hemiacetals.

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Chapter 26 Solutions
ORG CHEM CONNECT CARD
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