3. Which of the following is (are) structural feature(s) of a "Wittig salt"? Check all that apply. a. it contains a positively charged phosphorus atom b. it contains acidic protons c. it contains a carbon-oxygen double bond d. it contains a negatively charged phosphorus atom e. it contains a nucleophilic carbon
3. Which of the following is (are) structural feature(s) of a "Wittig salt"? Check all that apply. a. it contains a positively charged phosphorus atom b. it contains acidic protons c. it contains a carbon-oxygen double bond d. it contains a negatively charged phosphorus atom e. it contains a nucleophilic carbon
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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Transcribed Image Text:3. Which of the following is (are) structural feature(s) of a "Wittig salt"? Check all that apply.
a. it contains a positively charged phosphorus atom
b. it contains acidic protons
c. it contains a carbon-oxygen double bond
d. it contains a negatively charged phosphorus atom
e. it contains a nucleophilic carbon
Transcribed Image Text:BACKGROUND
In part A of this experiment, the Wittig salt is prepared through the nucleophilic displacement of
chloride ion by triphenylphosphine:
Ph.
PhP-C-Ph
Ph
Ph3P: + Ph
Wittig salt
• The positive charge on phosphorus makes the protons on the adjacent carbon highly acidic.
In part B, a strong base (sodium ethoxide) is used to abstract this acidic proton and produce
the phosphorus ylide.
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