Trans 1 Bromo 3 Isopropylcyclohexane

The first pace in drawing the chair conformation for cis-one-bromo-3-methylcyclohexane is to clarify what cis means. The easiest way to explain what cis means is to look at the compound'south wedge-dash notation.

If 2 groups are on a wedge, which means that they are coming out of the aeroplane of the page, they are said to be cis, or have a cis relationship. If one of the two groups is on a wedge, and the other is on a dash (going into the plane of the folio), then they are said to exist trans.

Since we were told that the compound is cis, the bromo and methyl groups must either be both on a wedge, or both on a dash. I'll show you the instance when both are on a wedge

Next, you lot have to number each carbon atom; you lot start from whatsoever carbon cantlet and go either clockwise, or counterclockwise, the simply important matter is that yous go on runway of what carbon is numbered every bit (one) and what direction you used.

I'll use every bit carbon (i) the one that has the bromo grouping attached. I'll go clockwise, which ways that the methyl group will be fastened to carbon (3).

Now draw your chair conformation template.

Notice that the carbon atoms are numbered by going in the same clockwise direction. Now, in that location are ii ways you lot can add groups to a chair conformation.

I way is Upward, which is equivalent of a group that's on a wedge, and the other way is Downwardly, which is equivalent ot a group that's on a dash.

SInce y'all're got the bromo and methyl groups in cis, both must be placed on centric bonds, or UP. Here's how that would look

The bromo group is upward on carbon (1), while the methyl group is downwards on carbon (3). That'south a chair conformation for cis-one-bromo-iii-methylhexane.