Concept explainers
(a)
Interpretation: The Haworth projection for
Concept introduction: The structural representation of sugar molecule in cyclic form is known as Haworth projection. Sugar molecule that has six-membered-ring is known as pyranose and sugar molecule that has five-membered-ring is called furanose.
Answer to Problem 28.45P
The Haworth projection for
Explanation of Solution
The structure of D-talose is,
Figure 1
The steps for the conversion of Fischer projection of D-talose into Haworth projection is as follow:
Step-1 Talopyranose ring is formed by the attack of
Step 2 The Haworth projection of D-talopyranose,
Step 3 In the beta-form, the substituents
Step-4 The substituents which are present on the right side in the Fischer projection are drawn on the below the ring in the Haworth projection. Similarly, the substituents which are present on the left side in the Fischer projection are drawn on the above the ring in the Haworth projection.
The conversion of D-talose into
Figure 2
The Haworth projection for
(b)
Interpretation: The Haworth projection for
Concept introduction: The structural representation of sugar molecule in cyclic form is known as Haworth projection. Sugar molecule that has six-membered-ring is known as pyranose and sugar molecule that has five-membered-ring is called furanose.
Answer to Problem 28.45P
The Haworth projection for
Explanation of Solution
The structure of D-mannose is,
Figure 3
The steps for the conversion of Fischer projection of D-mannose into Haworth projection is as follow:
Step-1 Mannosepyranose ring is formed by the attack of
Step 2 The Haworth projection of D-mannosepyranose,
Step 3 In the beta-form, the substituents
Step-4 The substituents which are present on the right side in the Fischer projection are drawn on the below the ring in the Haworth projection. Similarly, the substituents which are present on the left side in the Fischer projection are drawn on the above the ring in the Haworth projection.
The conversion of D-mannose into D-mannosepyranose is shown below.
Figure 4
The Haworth projection for
(c)
Interpretation: The Haworth projection for
Concept introduction: The structural representation of sugar molecule in cyclic form is known as Haworth projection. Sugar molecule that has six-membered-ring is known as pyranose and sugar molecule that has five-membered-ring is called furanose.
Answer to Problem 28.45P
The Haworth projection for
Explanation of Solution
The structure of D-galactose is,
Figure 5
The steps for the conversion of Fischer projection of D-galactose into Haworth projection is as follow:
Step-1 Galactopyranose ring is formed by the attack of
Step 2 The Haworth projection of D-galactopyranose,
Step 3 In the alpha-form, the substituents
Step-4 The substituents which are present on the right side in the Fischer projection are drawn on the below the ring in the Haworth projection. Similarly, the substituents which are present on the left side in the Fischer projection are drawn on the above the ring in the Haworth projection.
The conversion of D-galactose into D-galactopyranose is shown below.
Figure 6
The Haworth projection for
(d)
Interpretation: The Haworth projection for
Concept introduction: The structural representation of sugar molecule in cyclic form is known as Haworth projection. Sugar molecule that has six-membered-ring is known as pyranose and sugar molecule that has five-membered-ring is called furanose.
Answer to Problem 28.45P
The Haworth projection for
Explanation of Solution
The structure of D-ribose is,
Figure 7
The steps for the conversion of Fischer projection of D-ribose into Haworth projection is as follow:
Step-1 Ribofuranose ring is formed by the attack of
Step 2 The Haworth projection of D-ribofuranose,
Step 3 In the alpha-form, the substituents
Step-4 The substituents which are present on the right side in the Fischer projection are drawn on the below the ring in the Haworth projection. Similarly, the substituents which are present on the left side in the Fischer projection are drawn on the above the ring in the Haworth projection.
The conversion of D-ribose into D-ribofuranose is shown below.
Figure 8
The Haworth projection for
(e)
Interpretation: The Haworth projection for
Concept introduction: The structural representation of sugar molecule in cyclic form is known as Haworth projection. Sugar molecule that has six-membered-ring is known as pyranose and sugar molecule that has five-membered-ring is called furanose.
Answer to Problem 28.45P
The Haworth projection for
Explanation of Solution
The structure of D-tagatose is,
Figure 9
The steps for the conversion of Fischer projection of D-tagatose into Haworth projection is as follow:
Step-1 Tagatofuranose ring is formed by the attack of
Step 2 The Haworth projection of D-tagatofuranose,
Step 3 In the alpha-form, the substituents
Step-4 The substituents which are present on the right side in the Fischer projection are drawn on the below the ring in the Haworth projection. Similarly, the substituents which are present on the left side in the Fischer projection are drawn on the above the ring in the Haworth projection.
The conversion of D-tagatose into D-tagatofuranose is shown below.
Figure 10
The Haworth projection for
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Chapter 28 Solutions
Organic Chemistry
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