
Concept explainers
(a)
Interpretation:
To determine the given Haworth structure as a or the ß form.
Concept Introduction :
D- Galactose is a monosaccharide with the chemical formula C6H12O6. A Haworth structure is a common way to write the structural formula of a given monosaccharide in the cyclic form with a simple 3-D perspective. It is an aldohexose just like D-glucose but it differs in the arrangement of hydroxyl group at carbon number 4. The beta position in case of D-galactose refers to the projection of -OH group above the plane of the ring. This occurs when -OH group is present on the same side of the ring as carbon number 6. Alpha configuration, on the other hand can be observed when there is downward projection of hydroxyl group and this happens due to -OH group when present on the opposite side of the ring just like carbon number 6.
(b)
Interpretation:
To determine the given Haworth structure as a or the ß form.
Concept Introduction :
D- Galactose is a monosaccharide with the chemical formula C6H12O6.A Haworth structure is a common way to write the structural formula of a given monosaccharide in the cyclic form with a simple 3-D perspective. It is an aldohexose just like D-glucose but it differs in the arrangement of hydroxyl group at carbon number 4. The beta position in case of D-galactose refers to the projection of -OH group above the plane of the ring. This occurs when -OH group is present on the same side of the ring as carbon number 6. Alpha configuration, on the other hand can be observed when there is downward projection of hydroxyl group and this happens due to -OH group when present on the opposite side of the ring just like carbon number 6.

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Chapter 18 Solutions
Basic Chemistry
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