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Chapter 5: Q5-51P (page 190)

Which bond is stronger? Briefly explain why.

Short Answer

Expert verified

a. CH3-Cl bond is stronger.

b. I-Br bond is stronger.

Step by step solution

01

Reason of stronger bond

A bond between two atoms becomes stronger when it is hard to break, which means when the bond is strong. If there is a huge charge separation between two atoms, the bond will be weaker and easy to break as the electron is shifted towards a certain atom and not shared by both of the atoms equally.

02

 Step 2: Comparison of bond strength

a. In the 1st case, the CH3-Br bond has longer distance than CH3-Cl as Cl is more electronegative which it will pull more electrons towards it than Br which makes the latter bond stronger and hard to break.

b. In the 2nd case, the I-Br bond has a longer distance than Br-Br as in the latter case, both the Br are same in size which increases its lattice energy than the former case where one atom is I is more diffused in nature. As a matter of fact, due to high lattice energy, the Br-Br bond is stronger.

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Most popular questions from this chapter

Draw structures for the following:

a. (2E,4E)-1-chloro-3-methyl-2,4-hexadiene

b. (3Z,5E)-4-methyl-3,5-nonadiene

c. (3Z,5Z)-4,5-dimethyl-3,5-nonadiene

d. (3E,5E)-2,5-dibromo-3,5-octadiene

Question: Which of the following are electrophiles, and which are nucleophiles?

In a reaction in which reactant A is in equilibrium with product B at

25 °C, what relative amounts of A and B are present at equilibrium if ΔG° at 25 °C is

a. 2.72 kcal/mol?

b. 0.65 kcal/mol?

c. -2.72 kcal/mol?

d. -0.65 kcal/mol?

Which is more stable?

Draw curved arrows to show the movement of the electrons that result in formation of the given product(s).
See all solutions

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