Question

convert the fischer projection formula into a representation that uses wedges and dashed wedges.

Explanation:

Step1: Recall Fischer - wedge rules

In Fischer projection, horizontal lines represent bonds coming out of the plane (wedges) and vertical lines represent bonds going into the plane (dashed - wedges).

Step2: Convert the groups

The $-H_3C$ and $-CH_2 - CH_3$ are on the horizontal line, so they will be represented as wedges. The $-H$ and $-NH_2$ are on the vertical line, so they will be represented as dashed - wedges.

Answer:

The carbon atom is in the center. The $-CH_3$ and $-CH_2 - CH_3$ groups are drawn as solid wedges coming out of the plane of the paper, and the $-H$ and $-NH_2$ groups are drawn as dashed - wedges going into the plane of the paper.