Which structure is the enantiomer of D-arabinose? A CHO H OH HOH HO H CH
OH B CHO HO H OH H OH C CHO H OH HOH HO CH
OH D CHO H OH HOH HO CH
OH E CHO H OH HOH HO CH
OH F CHO HO H OH HO H CH
OH What is the name of the enantiomer? name:
The Correct Answer and Explanation is:
The correct answer is E, which is the enantiomer of D-arabinose.
Explanation:
Enantiomers are a pair of molecules that are non-superimposable mirror images of each other, like left and right hands. They have the same molecular structure and connectivity of atoms but differ in the spatial arrangement of atoms or groups. When looking at the structures of sugars like arabinose, the orientation of the hydroxyl (OH) groups at the chiral centers determines whether one structure is the enantiomer of another.
- D-arabinose is a monosaccharide that has four carbon atoms, and the stereochemistry of D-arabinose is such that the hydroxyl groups on the chiral centers are arranged in a specific orientation.
- The enantiomer of D-arabinose would have the opposite configuration at every chiral center compared to D-arabinose.
In this case, looking at the structures, E shows the opposite configuration at every chiral center of D-arabinose, making it its enantiomer.
