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10 points Problems & questions (10 points) You may do any 2 out of the 3 problems in this section to count for up to 5 points each. If you do any 3, and the lowest will be counted as extra credit. 1. Energy and strain: Identify the three types of strain that contribute to the instability of cis-1-methyl-2-propylcyclopropane (below) QUESTION 18 H H H CH3 CH₂CH₂CH3 2. Determine R and S configurations for the following molecules: Unbonded substituent is the dotted line (into the back of the page) Br HO ***** C -CH₂CH3 A H CH3 NH2 – C A I H COOH -F Br***** H Cl 3. What products should you expect to obtain when you react cis-1,3 butadiene with 2 propen-1-al? Save Answer