Concept explainers
Interpretation:
The leaving group in the given molecule is to be determined in order identify the positively charged and neutral fragments produced during mechanism.
Concept Introduction:
Heterolytic cleavage of sigma bond occurs under a variety of conditions. The mechanism of bond cleavage is as shown below,
The arrow in the above mechanism indicates that the sigma electrons form A-B bond are leaving A and becoming the exclusive property of B. Since the fragment A is formally losing one electron, it must become positively charged and B must become negatively charged since it gains an electron.
Often, heterolytic cleavage occurs from a charged intermediate that was formed in a previous step. The process is the same, but the charge on the products is different.
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Pushing Electrons
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- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning