Grignard Synthesis: Ph-Mg-X + tert-Butyl Alcohol

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SUMMARY

The reaction between phenyl magnesium halide (Ph-Mg-X) and tert-butyl alcohol results in the formation of benzene, not tert-butyl benzene. This outcome occurs because the Grignard reagent acts as a strong base, deprotonating the alcohol to generate benzene and magnesium alkoxide (X-Mg-OH). The misconception that tert-butyl benzene is formed arises from a misunderstanding of the reactivity of Grignard reagents with alcohols.

PREREQUISITES
  • Understanding of Grignard reagents, specifically RMgX.
  • Knowledge of reaction mechanisms involving strong bases.
  • Familiarity with the properties of alcohols and their reactivity with nucleophiles.
  • Basic organic chemistry concepts, including alkylation and deprotonation reactions.
NEXT STEPS
  • Study the mechanism of Grignard reactions with alcohols in detail.
  • Explore the reactivity of different Grignard reagents with various functional groups.
  • Learn about the synthesis of alkylbenzenes through Grignard reactions.
  • Investigate the role of magnesium halides in organic synthesis.
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Chemistry students, organic chemists, and anyone interested in understanding Grignard synthesis and its applications in organic reactions.

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Homework Statement


Predict the product, along with the reaction mechanism,of the given reactants -:

Ph-Mg-X + tert-butyl alcohol \longrightarrow \ ?

My attempt
This is a grignard synthesis, RMgX where R is phenyl carbanion . The general reaction with water gives alkanes,and X-Mg-OH . Similarly the reaction with alcohol should give tertbutyl benzene and X-Mg-OH ? But the given answer is benzene.
Could someone give an explanation as to how that is being formed ?
Any links to webpages explaining griganard reactions with alcohols will also be appreciated.
Thx
 
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What is the product of a reaction between a grignard (strong base and sometimes alkylating agent) and an alcohol?

This statement is not correct:
Similarly the reaction with alcohol should give tertbutyl benzene and X-Mg-OH ?