Structures and Natural Products
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11. Refer to Exhibit 9-7. Two structures have been proposed for this natural product. Circle the structure that is consistent with the information presented and briefly explain your choice.
12. Draw a structure for a singly substituted chiral chloroalkane that contains four carbon atoms with R stereochemistry. Indicate the chirality center with an asterisk.
14. Refer to Exhibit 5-7.
a. The structures attached show the step-wise bond making and bond breaking in this reaction. Daw curved arrows to show the electron flow that has occurred in each step.
b. Calculate K for the reaction in part a.
c. Calculate dG for the reaction in part a.
25. We will learn next semester that the addition of a Grignard reagent (HH3CH2MgBr) to acetophenone gives a tertiary alcohol. Assuming addition of the Grignard reagent occurs from the Re-face, draw the product with the proper stereochemistry.
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11. The cyclic compound is achiral due to a plane of symmetry present in the molecule. Hence it cannot have optical activity. This makes the 2nd compound ...
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