Question

Which Haworth projection corresponds to the β-pyranose form of the Fischer projection?

A) This information is not provided.
B) β-pyranose form does not have a corresponding Haworth projection.
C) The Haworth projection depends on the specific sugar.
D) The Haworth projection is always the same for all β-pyranose forms.

Answer 1

The Haworth projection for the β-pyranose form of a sugar depends on the specific monosaccharide, as the arrangement in the Fischer projection determines the positions in the Haworth projection.

Step-by-step explanation:

When converting from Fischer projections to Haworth projections, the specific sugar in question is required to determine the corresponding Haworth projection. In general, the correct option among the provided choices would be C) The Haworth projection depends on the specific sugar, as the arrangement of groups in the Fischer projection dictates their positions in the Haworth projection. For the β-pyranose form, groups on the right in the Fischer projection will appear below the plane of the ring in the Haworth projection, while groups on the left will appear above the plane. Additionally, the orientation of the OH group on the anomeric carbon (C1) distinguishes the alpha (α) and beta (β) forms, with the β form having the OH group positioned above the plane of the ring when drawn in the Haworth projection.