Concept explainers
(a)
Interpretation:
The Lewis structure for an aldetetrose is to be drawn.
Concept introduction:
Monosaccharides are called simple sugars, with the number of oxygen atoms same as the number of carbon atoms. The general formula for monosaccharides is
Answer to Problem 4.25P
The Lewis structure for an aldetetrose is
Explanation of Solution
Aldotetrose is a mono-saccharide. The name “aldo” indicates that the carbonyl group must be present at the terminal carbon atom, while the word “tetrose” indicates a chain of four carbon atoms. Thus, aldotetrose is a sugar having an
The molecular formula for the above structure is
Altetrose is a mono-saccharide having a carbonyl group at the terminal carbon atom, and its molecular formula is
(b)
Interpretation:
The Lewis structure for a ketotetrose is to be drawn.
Concept introduction:
Monosaccharides are called simple sugars, with the number of oxygen atoms same as the number of carbon atoms. The general formula for a monosaccharide is
Answer to Problem 4.25P
The Lewis structure for a ketotetrose is
Explanation of Solution
Ketotetrose is a type of mono-saccharide. The name “keto” indicates that the carbonyl group must be present at the internal carbon atom, while the word “tetrose” indicates the chain of four carbon atoms. Thus, ketotetrose is a sugar having a carbonyl group at the internal carbon atom, and the structure must have four carbon atoms. The general molecular formula for mono-saccharides is
The molecular formula for the above structure is
Ketotetrose is a mono-saccharide having a carbonyl group at the internal carbon atom, and its molecular formula is
(c)
Interpretation:
The Lewis structure for an aldetriose is to be drawn.
Concept introduction:
Monosaccharides are called simple sugars, with the number of oxygen atoms same as the number of carbon atoms. Thus, the general molecular formula for a monosaccharide is
Answer to Problem 4.25P
The Lewis structure for an aldetriose is
Explanation of Solution
Aldotriose is a type of mono-saccharide. The name “aldo”’ indicates that the carbonyl group must be present at the terminal carbon atom, while the word “triose” indicates a chain of three carbon atoms. Thus, aldotriose is a sugar having an aldehyde group at the terminal carbon atom, and the structure must have three carbon chain. The general molecular formula for mono-saccharides is
The molecular formula for the above structure is
Altetrose is a mono-saccharide having a carbonyl group at the terminal carbon atom, and its molecular formula is
(d)
Interpretation:
The Lewis structure for a ketotriose is to be drawn.
Concept introduction:
Monosaccharides are called simple sugars, with the number of oxygen atoms same as the number of carbon atoms. Thus, the general molecular formula for a monosaccharide is
Answer to Problem 4.25P
The Lewis structure for a ketotriose is
Explanation of Solution
Ketotriose is a type of mono-saccharide. The name “keto” indicates that the carbonyl group must be present at the internal carbon atom, while the word “tetrose” indicates the chain of four carbon atoms. Thus, ketotriose is a sugar having a carbonyl group at the internal carbon atom, and the structure must have three carbon atoms. The general molecular formula for mono-saccharides is
The molecular formula for the above structure is
Ketotetrose is a mono-saccharide having a carbonyl group at the internal carbon atom, and its molecular formula is
(e)
Interpretation:
The Lewis structure for a ketohexose, which is different from fructose, is to be drawn.
Concept introduction:
Monosaccharides are called simple sugars, with the number of oxygen atoms same as the number of carbon atoms. Thus, the general molecular formula for a monosaccharide is
Answer to Problem 4.25P
The Lewis structure for a ketohexose, which is different from fructose, is
Explanation of Solution
The Lewis structure for fructose is
Fructose is a ketohexose with a molecular formula
The molecular formula for the above structure is
Ketohexose is a mono-saccharide having a carbonyl group at the internal carbon atom, and its molecular formula is
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Chapter 4 Solutions
Organic Chemistry: Principles And Mechanisms (second Edition)
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