(Solved): 1. Indicate the position, axial or equatorial, of each of the groups shown when the ring is in its ...

1. Indicate the position, axial or equatorial, of each of the groups shown when the ring is in its more stable chair conformation. Also calculate the total strain energy in this conformation (10 points). a. b. c. 2. Indicate whether the pairs of structures shown represent: 1) stereoisomers; 2) constitutional isomers; 3) different conformations of the same compound; or 4) the same conformation of a compound viewed from a different perspective (10 points). 3.The molecule shown is an insecticide used for crop protection. Draw the more stable chair cyclohexane form of the molecule (10 points). 4. Assign the correct absolute configuration to the indicated chiral centers ( 12 points). $\begin{array}{l}1=\\ 2=\\ 3=\end{array}$ 5. Draw a skeletal structure that corresponds to the molecule shown in the Newman Projection below. Assign $\mathrm{R}$ or $\mathrm{S}$ chirality to the chiral centers of the molecule ( 12 points). 6. Which of the following represent identical or different stereoisomeric pairs (12 points)? A. B. 7. Identify the indicated faces in the following molecules as Re or $\mathrm{Si}$ (8 points). Top Face A. B. Bottom Face 8. Indicate all centers of chirality in the molecule below by clearly placing an asterisk $\left({}^{?}\right)$ at each. If there are none, indicate none ( 8 points). 9. Draw a structural formula of the RS configuration of the molecule shown below ( 8 points). 10. Identify the structures below as either: 1) chiral; 2) achiral; or 3) meso (10 points). 11. Draw curved arrows on the diagram to show electron reorganization (flow of electrons) for the reaction shown 6 points). 12. Draw the products of the reaction shown ( 6 points). $?$ Products? 13. Rank the cations in order of relative stability (1 through 4). 4 is the MOST STABLE cation (10 pts). 14. What is the approximate value of the $D^{?}$ for the SECOND STEP of the reaction shown ( 6 points)? 15. Determine the Degree of Unsaturation (\# of Double Bond Equivalents) in a molecule with molecular formula ${\mathrm{C}}_{11}{\mathrm{H}}_{16}{\mathrm{F}}_3{\mathrm{N}}_3{\mathrm{O}}_2$. You must show your work to obtain credit (6 points). 16. Provide the IUPAC name for the compound shown, including the assignment of (E)- or (Z)stereochemistry if needed ( 6 points). ANSWER: (12)-1-bromo-1-chloro-2,7dimethylocta-1,6-diene. NOTE: there is no $E,Z$ designation for the double bond at carbons 6,7.