Drawing the Newman projection Determine the systematic (IUPAC) name for each of the molecules represented by the Newman projections below. H H H H3C Newman Projection H CH3 CI H IUPAC Name H Br H Cl ☐ H H H Br H Explanation Check CH 3 ☐
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- CH3 HC-C-OН CH3 1 H₂SO4 H3C H3C C=CH2 2 ?Label a curve of potential energy vs. dihedral angle for the Newman conformations of 2,3-dimethylbutane. In each case, the C-2 to C-3 bond rotates in the clockwise direction. Step 1: Translate line-bond notation to the Newman projection. Step 2: Identify Newman projections for each rotation. HI ||| H Step 3: Identify the relative stability of each Newman projection. Step 4: Construct the energy diagram. Step 2: Identify the Newman projections for each rotation (continued). As the back carbon rotates, the Newman projections alternate from staggered to eclipsed and back again. Fill in the remaining conformations for each conformation labeled with the angle of internal rotation from the starting Newman projection. Starting structure - 0° 120° 180° CH3 H₂C H H Answer Bank CH3 -CH3 CH3 H CH3 □ O CH3 O 240° 300° CH3 CH3 DFØ CH3 H CH3 CH3 H CH3Write the complete common (not IUPAC) name of each molecule below. Note: if a molecule is one of a pair of enantiomers, be sure you start its name with D- or L- so we know which enantiomer it is. molecule H₂N O HO C=0 HN N+ H- CH₂ H common name (not the IUPAC name) NH3 0 5
- Convert the structure to a Newman projection around the indicated bondFill in the blanks: cis-1,3-Dimethylcyclohexane has two different chair conformations: one withboth methyl groups in __________ positions and one with both methyl groups in ____________ positions.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.