A trisubstituted cyclohexane compound is given below in its chair conformation. Draw the corresponding planar (overhead) representation, using wedge-and-dash bonds to indicate the substituent positions. To be graded properly, include the hydrogen atoms on the chirality centers (asymmetric carbons). Be sure that both wedge/dash bonds are drawn on the outside of the ring, or else the stereochemistry may be interpreted as square planar.

First, the chiral centres (asymmetric carbons) are located at positions 1,2 and 4 on the ring, each having a substituted atom Br, F and Cl respectively.

A Chiral centre is usually recognized when a carbon atom is substituted by four different atoms or groups of atoms.

In organic chemistry, especially for chair-ringed structures, the chiral centre is usually bonded to at least two other carbon atoms, and the remaining two atoms bonded to it assume two positions, namely; axial and equatorial positions.

An atom attached by a bond that is perpendicular to the axis of the ring is said to be in an equatorial position.

An atom attached by a bond that is parallel to the axis of the ring is said to be in an axial position.

Hence, the chiral Hydrogen atom and the other substituted atoms assume either an axial or an equatorial position.

According to the chair-ringed structure in the question, the Br and Cl atoms are at an axial position, while the F atom is at the equatorial position. Consequently, the wedge bonds represent the position of the chiral hydrogen atom and the substituted atoms on the planar structure with respect to their axial position on the chair-ringed structure. The dash bonds represent the position of the atoms on the planar structure with respect to their equatorial position on the chair-ringed structure shown in the question.

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