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Chapter 6: Problem 6.28 (page 241)

Classify each transformation as substitution, elimination, or addition.

a.

b.

Short Answer

Expert verified

Answer

  1. Elimination reaction
  2. Addition reaction

Step by step solution

01

Step-by-Step SolutionStep 1: Substitution Reaction

The reactions that involve the replacement/substitution of a group or atom by another is termed substitution reaction.

02

Addition and Elimination Reactions

The addition of atoms or groups of atoms to a substrate is termed an addition reaction, and the removal or elimination of atoms/groups of atoms from a substrate is termed an elimination reaction.

03

Classifying the given reactions

a. The reaction ‘a’ involves the elimination of H2OH+OHfrom the starting material leading to the formation of a pi bond in the product.


Elimination reaction in a.

Therefore, the given reaction is an elimination reaction.

b. The given reaction involves the addition of hydrogen and a hydroxyl group to the carbonyl carbon leading to the conversion of the pi bond to two sigma bonds.

Addition reaction in b.

The given reaction is an addition reaction.

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Most popular questions from this chapter

Draw an energy diagram for each reaction. Label the axes, the starting material, product, transition state, ΔH°, and Ea.

a.a concertedwith ΔH°=-80kJ/moland Ea=16kJ/mol.

b. a two-step reaction, A→B→C, in which the relative energy of the compounds is A<C<B, and the step A→Bis rate-determining.

Calculate ΔH° for each reaction.

  1. HO·+CH4→.CH3+H2O
  2. CH3OH+HBr→CH3Br+H2O

Draw the transition state for each reaction.

a.

b.

What carbon radical is formed by homolysis of theC-Ha bond in propylbenzene? Draw all reasonable resonance structures for this radical.

What carbon radical is formed by homolysis of therole="math" localid="1648540916945" C-Hbbond in propylbenzene? Draw all reasonable resonance structures for this radical.

The bond dissociation energy of one of the C-H bonds is considerably less than the bond dissociation energy of the other. Which C-H bond is weaker? Offer an explanation.

Identify the catalyst in each equation.

a.

b.
See all solutions

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