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प्रश्न
3, 3-dimethyl butane-2-ol on treatment with conc. H2SO4 to give tetramethyl ethylene as a major product. Suggest a suitable mechanism.
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उत्तर
According to Saytzeff’s rule the dehydration of 3, 3-dimethyl butane-2-ol gives a mixture of alkenes. But the secondary carbocation formed in this reaction undergoes rearrangement to form a more stable tertiary carbocation which further, undergoes 13 elimination leads more stable product, that is 2, 3-dimethyl but-2-ene (more yield). According to Saytzeff’s rule, 2, 3-dimethyl pent-2-ene is the major product.
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संबंधित प्रश्न
Which one of the following will react with phenol to give salicylaldehyde after hydrolysis.
Assertion: Phenol is more acidic than ethanol.
Reason: Phenoxide ion is resonance stabilized.
Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.
Identify A, B, C, D and write the complete equation.
Identify the product (s) is / are formed when 1 – methoxy propane is heated with excess HI. Name the mechanism involved in the reaction.
What will be the product (X and A) for the following reaction?
acetylchloride\[\ce{->[i) CH3MgBr][ii) H3O^+]X->[acid K2Cr2O7]A}\]
Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.
What will be the product (X and A)for the following reaction
\[\ce{acetylchloride ->[i) CH3MgBr][ii) H3O] X ->[acid K2Cr2O7] A}\]
What will be the product (X and A)for the following reaction
\[\ce{acetylchloride ->[i) CH3MgBr][ii) H3O^+]X ->[acid K2Cr2O7]A}\]
Predict the major product, when 2-methyl but-2-ene is converted into an alcohol of the following method:
Acid catalysed hydration
