A Fischer projection of a chiral compound with one stereocentre is rotated by 90 deg in the plane of the paper. Without further changes, the redrawn projection represents the:

enantiomer of the original compound

diastereomer of the original compound

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NEET levelSingle correct optionDifficulty 1 of 3st086

A Fischer projection of a chiral compound with one stereocentre is rotated by $9 0^{\circ}$ in the plane of the paper. Without further changes, the redrawn projection represents the:

Asame compound
Benantiomer of the original compound
Cdiastereomer of the original compound
Dracemic mixture

Answer: B

After a

9 0^{\circ}

rotation the groups that were vertical (going back) become horizontal (coming forward) and vice versa. Each group therefore moves into a position of the opposite kind, so the drawing now corresponds to the mirror-image arrangement. For a single stereocentre this is the enantiomer.

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A Fischer projection of a chiral compound with one stereocentre is rotated by 90∘ in the plane of the paper. Without further changes, the redrawn projection represents the:

Answer: B

More questions on Fischer, Newman and sawhorse projections

A Fischer projection of a chiral compound with one stereocentre is rotated by $9 0^{\circ}$ in the plane of the paper. Without further changes, the redrawn projection represents the: