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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 鈥榓鈥� 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

a. Which value corresponds to a negative value of 鈭�G掳:Keq=10-2or Keq=102?

b. In a unimolecular reaction with five times as much starting material as product at equilibrium, what is the value of Keq? Is 鈭�G掳positive or negative?

c. Which value corresponds to a larger Keq: 鈭�G掳=-8kJ/molor 鈭�G掳=20kJ/mol?

Label each statement as true or false. Correct any false statement to make it true.

a. Increasing temperature increases reaction rate.

b. If a reaction is fast, it has a large rate constant.

c. A fast reaction has a large negative 鈭�G掳value.

d. When Eais large, the rate constant k is also large.

e. Fast reactions have equilibrium constants > 1.

f. Increasing the concentration of a reactant always increases the rate of a reaction.

For a reaction with Keq=0.8and Ea=80kJ/mol, decide which of the following statements is (are) true. Correct any false statement to make it true. Ignore entropy considerations. (a) The reaction is faster than a reaction with Keq=8and Ea=80kJ/mol. (b) The reaction is faster than a reaction with Keq=0.8and Ea=40kJ/mol. (c) 鈭�G掳 for the reaction is a positive value. (d) The starting materials are lower in energy than the products of the reaction. (e) The reaction is exothermic.

As we learned in Chapter 4, propane (CH3CH2CH3)has both 1掳and 2掳hydrogens.

  1. Draw the carbon radical formed by homolysis of each type of C-H bond.
  2. Use the values in Table 6.2 to determine which C-H bond is stronger.
  3. Explain how this information can be used to determine the relative stability of the two radicals formed. Which radical formed from propane is more stable?

Identify the catalyst in each equation.

a.

b.
See all solutions

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