Explore BrainMass

Explore BrainMass

    Structures and Natural Products

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    See the attached file.

    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.

    © BrainMass Inc. brainmass.com October 10, 2019, 5:37 am ad1c9bdddf


    Solution Preview

    See the attached file.

    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 ...

    Solution Summary

    The structures and natural products are examined in the solution.