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Question
Which of the following is structure of β-D-glucopyranose?
Which of the following is structure of β-D-glucopyranose?
d
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Solution
The correct option is B
In the pyranose ring, CH2OH group is added at the terminal, placed above the plane of the hexagon ring always. Groups which are present on the left-hand side in Fischer projection are placed above the plane of the ring and placed all the groups of right hand below the plane of the ring. Due to this arrangement, a new asymmetric carbon atom is created at the carbonyl carbon and it is referred to as anomeric carbon atom. Anomers are two different configurations that are possible for the anomeric carbon atom. The position of OH group differs at C1 in both the structures, where alpha stands for down OH group and beta for up OH group. Hence, the correct answer is option (b).
In the pyranose ring, CH2OH group is added at the terminal, placed above the plane of the hexagon ring always. Groups which are present on the left-hand side in Fischer projection are placed above the plane of the ring and placed all the groups of right hand below the plane of the ring. Due to this arrangement, a new asymmetric carbon atom is created at the carbonyl carbon and it is referred to as anomeric carbon atom. Anomers are two different configurations that are possible for the anomeric carbon atom. The position of OH group differs at C1 in both the structures, where alpha stands for down OH group and beta for up OH group. Hence, the correct answer is option (b).
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