Reduction of Benzophenone by Sodium borohydride. 1.a. Write the balanced chemical equation for the reactionb. Using the curly arrow notation draw a mechanism for the reactionExplain the role of cHCI in the work-up step2a. Explain why the Rf of benzophenone and diphenylmethanol are expected todiffer, which should have higher Rf and why?C.4b. In a series of drawings show how your TLC plates looked as the experimentprogressed over the 45 minute reaction time.c. Comparing the TLC at t=15 minutes with that at t=30 minutes and at t=45minutes explain how you were able to follow the progress of the reactiond. Showing your calculation, record (to one decimal place) the Rf ofbenzophenone and of diphenylmethanol.3a. Explain the principles on which a solvent should be selected forrecrystallisationWrite an SOP for how a recrystallisation should be carried outa.Record the melting range of your crude sample, your purified sample andthe pre-mixed sampleb.b. Compare these values with the literature melting point range fordiphenylmethanol and use this information to draw a conclusion on the purity ofyour crude and purified diphenylmethanol samples5a. Insert a photo of your fully labelled sample of diphenylmethanol or recordthe detail from the label here.Give a physical description of the product.C. Comment on how your percentage yield compared with the theoretical yieldyou calculatedb.

Note- Since it is a multiple question, hence I solved first question according to rules of bartleby.…

Answered: 1. a. Write the balanced chemical…

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

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter89: Thin-layer Chromatography

Section: Chapter Questions

Problem 5P

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Question

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.

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