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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

Question: Draw the structure for each of the following:

a. 3,3-dimethylcyclopentene

b. 6-bromo-2,3-dimethyl-2-hexene

c. ethyl vinyl ether

d. allyl alcohol

Draw curved arrows to show the movement of the electrons in the following reaction steps:

Draw the skeletal structure of 3,3-dimethyl-7-(1-methyl ethyl)-6-(1-methyl propyl) decane.

Squalene, a hydrocarbon with the molecular formula C30H50, is obtained from shark liver. (Squalus is Latin for “shark.”) If squalene is an acyclic compound, how many π bonds does it have?

a. Which is the most stable: 3,4-dimethyl-2-hexene, 2,3-dimethyl-2-hexene, or 4,5-dimethyl-2-hexene?

b. Which compound has the largest heat of hydrogenation?

c. Which compound has the smallest heat of hydrogenation?
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