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1. a. Write the balanced chemical equation for the reaction b. Using the curly arrow notation draw a mechanism for the reaction c. Explain the role of cHCI in the work-up step

1. a. Write the balanced chemical equation for the reaction b. Using the curly arrow notation draw a mechanism for the reaction c. Explain the role of cHCI in the work-up step

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Reduction of Benzophenone by Sodium borohydride.

1. a. Write the balanced chemical equation for the reaction b. Using the curly arrow notation draw a mechanism for the reaction Explain the role of cHCI in the work-up step 2 a. Explain why the Rf of benzophenone and diphenylmethanol are expected to differ, which should have higher Rf and why? C. 4 b. In a series of drawings show how your TLC plates looked as the experiment progressed over the 45 minute reaction time. c. Comparing the TLC at t=15 minutes with that at t=30 minutes and at t=45 minutes explain how you were able to follow the progress of the reaction d. Showing your calculation, record (to one decimal place) the Rf of benzophenone and of diphenylmethanol. 3 a. Explain the principles on which a solvent should be selected for recrystallisation Write an SOP for how a recrystallisation should be carried out a. Record the melting range of your crude sample, your purified sample and the pre-mixed sample b. b. Compare these values with the literature melting point range for diphenylmethanol and use this information to draw a conclusion on the purity of your crude and purified diphenylmethanol samples 5 a. Insert a photo of your fully labelled sample of diphenylmethanol or record the detail from the label here. Give a physical description of the product. C. Comment on how your percentage yield compared with the theoretical yield you calculated b.
Transcribed Image Text:1. a. Write the balanced chemical equation for the reaction b. Using the curly arrow notation draw a mechanism for the reaction Explain the role of cHCI in the work-up step 2 a. Explain why the Rf of benzophenone and diphenylmethanol are expected to differ, which should have higher Rf and why? C. 4 b. In a series of drawings show how your TLC plates looked as the experiment progressed over the 45 minute reaction time. c. Comparing the TLC at t=15 minutes with that at t=30 minutes and at t=45 minutes explain how you were able to follow the progress of the reaction d. Showing your calculation, record (to one decimal place) the Rf of benzophenone and of diphenylmethanol. 3 a. Explain the principles on which a solvent should be selected for recrystallisation Write an SOP for how a recrystallisation should be carried out a. Record the melting range of your crude sample, your purified sample and the pre-mixed sample b. b. Compare these values with the literature melting point range for diphenylmethanol and use this information to draw a conclusion on the purity of your crude and purified diphenylmethanol samples 5 a. Insert a photo of your fully labelled sample of diphenylmethanol or record the detail from the label here. Give a physical description of the product. C. Comment on how your percentage yield compared with the theoretical yield you calculated b.
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