Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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### Adding Hydrogen Atoms to an Alkyne

**Objective:**
Add the appropriate number of hydrogen atoms to the given alkyne compound.

**Instructions:**
1. Observe the structure of the alkyne provided.
2. Complete the structure by adding the necessary hydrogen atoms to each carbon atom in the molecule.

**Tools Provided:**
- Drawing tools including single, double, or triple bonds.
- Element selection tools for Carbon (C) and Hydrogen (H).

**Molecule Structure:**
Here's the uncompleted structure of the alkyne:
```
      CH3
       |
H3C - C - C ≡ C - C - H
       |   |
       H   H
```

**Molecule Information:**
- IUPAC name: 4-methyl hexyne
- The structure consists of a six-carbon chain with a triple bond between the third and fourth carbon atoms.
- There is a methyl group (-CH3) attached to the fourth carbon atom.

**Steps to Complete the Structure:**
1. Add hydrogen atoms such that every carbon atom follows the valence rule of having four bonds in total.
2. Ensure the structural integrity of the alkyne group (≡) and the positioning of the methyl group.

**Final Structure:**
```plaintext
          H
          |
H3C - C - C ≡ C - CH2 - CH3
       |    |
      CH3 H
```
In this structure, all carbon atoms now have appropriate hydrogen atoms added to satisfy their four-bond requirement.

By completing these steps as shown, the alkyne now has the proper number of hydrogen atoms, making the molecule complete and correct according to its IUPAC name.
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Transcribed Image Text:### Adding Hydrogen Atoms to an Alkyne **Objective:** Add the appropriate number of hydrogen atoms to the given alkyne compound. **Instructions:** 1. Observe the structure of the alkyne provided. 2. Complete the structure by adding the necessary hydrogen atoms to each carbon atom in the molecule. **Tools Provided:** - Drawing tools including single, double, or triple bonds. - Element selection tools for Carbon (C) and Hydrogen (H). **Molecule Structure:** Here's the uncompleted structure of the alkyne: ``` CH3 | H3C - C - C ≡ C - C - H | | H H ``` **Molecule Information:** - IUPAC name: 4-methyl hexyne - The structure consists of a six-carbon chain with a triple bond between the third and fourth carbon atoms. - There is a methyl group (-CH3) attached to the fourth carbon atom. **Steps to Complete the Structure:** 1. Add hydrogen atoms such that every carbon atom follows the valence rule of having four bonds in total. 2. Ensure the structural integrity of the alkyne group (≡) and the positioning of the methyl group. **Final Structure:** ```plaintext H | H3C - C - C ≡ C - CH2 - CH3 | | CH3 H ``` In this structure, all carbon atoms now have appropriate hydrogen atoms added to satisfy their four-bond requirement. By completing these steps as shown, the alkyne now has the proper number of hydrogen atoms, making the molecule complete and correct according to its IUPAC name.
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