Fischer Projections Definition:

The Fischer Projection is a drawing style that is often used to draw compounds that have multiple chiral centers.

Fischer Projections Explained:

The features of this projection consist of horizontal and vertical lines. The horizontal lines represent the atoms that are directed toward the viewer while the vertical line represents atoms that are directed away from the viewer. The point of intersection represents the carbon atom. (Also see, dash and wedge)

Note –

• The Fischer Projection is used for acyclic compounds.
• It helps us analyze the stereochemistry of the molecule with ease. Every stereocentre is represented by the cross.
• The Fischer structure may only be turned by 180º within the plane but never flipped over or rotated by 90º

Example –