
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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![### Question 14
**__________ has three pi bonds.**
- [ ] 2-Hexyne
- [ ] Chlorobenzene
- [ ] 1-Ethyl-cyclohexene
- [ ] 1,3-butadiene
- [ ] Pentanoic acid
**Instructions:** Select the correct compound from the list that has three pi bonds.
### Explanation
In organic chemistry, pi bonds (π bonds) are a type of covalent bond formed by the sideways overlap of atomic orbitals. They are present in double and triple bonds between atoms. Identifying the number of pi bonds in a molecule involves analyzing the bonding and structure of the compounds provided.
### Analysis of Options:
1. **2-Hexyne:** This compound has a triple bond, which consists of one sigma bond and two pi bonds.
2. **Chlorobenzene:** In this aromatic compound, each double bond contributes one pi bond, with the benzene ring having a total of three pi bonds.
3. **1-Ethyl-cyclohexene:** This contains one double bond, hence only one pi bond.
4. **1,3-Butadiene:** This compound has two double bonds, yielding two pi bonds in total.
5. **Pentanoic acid:** This compound has no pi bonds in its structure.
### Solution:
Chlorobenzene is the correct answer as it is an aromatic compound with three double bonds, thus containing three pi bonds.](https://content.bartleby.com/qna-images/question/54a9d33b-c075-4af5-8013-3f49004b10ba/377adf76-fad8-4e63-b571-8449c11c8774/6guf43i_thumbnail.png)
Transcribed Image Text:### Question 14
**__________ has three pi bonds.**
- [ ] 2-Hexyne
- [ ] Chlorobenzene
- [ ] 1-Ethyl-cyclohexene
- [ ] 1,3-butadiene
- [ ] Pentanoic acid
**Instructions:** Select the correct compound from the list that has three pi bonds.
### Explanation
In organic chemistry, pi bonds (π bonds) are a type of covalent bond formed by the sideways overlap of atomic orbitals. They are present in double and triple bonds between atoms. Identifying the number of pi bonds in a molecule involves analyzing the bonding and structure of the compounds provided.
### Analysis of Options:
1. **2-Hexyne:** This compound has a triple bond, which consists of one sigma bond and two pi bonds.
2. **Chlorobenzene:** In this aromatic compound, each double bond contributes one pi bond, with the benzene ring having a total of three pi bonds.
3. **1-Ethyl-cyclohexene:** This contains one double bond, hence only one pi bond.
4. **1,3-Butadiene:** This compound has two double bonds, yielding two pi bonds in total.
5. **Pentanoic acid:** This compound has no pi bonds in its structure.
### Solution:
Chlorobenzene is the correct answer as it is an aromatic compound with three double bonds, thus containing three pi bonds.
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