Sighting along the C2-C3 bond of the 2-methylbutane, draw the Newman projection ofconformational isomer. State the most stable conformer

Consider the molecule 1-bromo-2-methylbutane. C3 and C4 should be drawn as Et as in theexample. This group is called an ethyl group and can be considered a sphere about twice the sizeof a methyl group. Draw the following Newman projections sighting down the C1C2 bond... a. The lowest potential energy conformation. b. The highest potential energy staggered conformation.

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Draw 2,4-dimethylhexane as a bond-line structure. Then, looking down the C3 – C4 bond, draw a Newman projection representation of the 1) lowest energy (most stable) and 2) highest energy (least stable) conformations.

translate the bond-line notation structure to the Newman projection by filling int the missing groups (A, B, C, D or E) on the lines in the Newman projection so they match the conformation given in the original structure. Circle if the conformation is a staggered or eclipsed.

Draw a Newman projection of 1-bromo-1-chloropropane in any staggered conformation. Draw the Newman projection as if you were looking down the C2-C1 bond, with C2 in the front.

Draw all Newman projections of 2,2 bromopropane conformations in which the CH3 group and the H of the CHY2 group are positioned 'gauche' to each other.

In the lowest energy chair conformation of cis-1,3-dimethylcyclohexane, how many axial positions are occupied by methyl groups?

(5) Draw the most stable chair conformation of the cyclohexane shown below. CH3 CI H3C Br OH CH3

2.Using Newman projections, draw the most stable conformation for each of the following compounds. (a) 3-methyl pentane, viewed along the C2-C3 bond (b) 3,3-dimethyl hexane, viewed along the C3-C4 bond