Use the information below to identify and explain the relationship between the basicity of the two nucleophiles and their nucleophilicities

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Use the information below to identify and explain the relationship between the basicity of the two nucleophiles and their nucleophilicities

### Reaction Details:

The reaction presented is:

\[ \text{Nuc}^- + \text{CH}_3\text{I} \xrightarrow{\text{CH}_3\text{OH}, 25^\circ \text{C}} \text{Nuc-CH}_3 + \text{I}^- \]

### Table of Nucleophile Properties:

| Nucleophile Name | \( pK_a \) of Conjugate Acid | \( k \) (second order rate constant) \\
|------------------|-------------------------------|---------------------------------------|
| \( \text{I}^- \) | -10                          | \( 3.4 \times 10^{-3} \, \text{M}^{-1} \cdot \text{s}^{-1} \) |
| \( \text{Cl}^- \) | -6                           | \( 3.0 \times 10^{-6} \, \text{M}^{-1} \cdot \text{s}^{-1} \) |

### Explanation:

- **Nucleophile Name:** Represents the reactive species that donates an electron pair in the reaction.
- **\( pK_a \) of Conjugate Acid:** Indicates the strength of the conjugate acid; a lower \( pK_a \) suggests a stronger acid.
- **\( k \):** This is the second-order rate constant for the reaction, measured in \(\text{M}^{-1} \cdot \text{s}^{-1}\), indicating the rate at which the reaction proceeds with different nucleophiles.

In this case, iodide (\(\text{I}^-\)) is a more effective nucleophile than chloride (\(\text{Cl}^-\)) under the given conditions, as shown by the greater rate constant \( k \) for iodide.
Transcribed Image Text:### Reaction Details: The reaction presented is: \[ \text{Nuc}^- + \text{CH}_3\text{I} \xrightarrow{\text{CH}_3\text{OH}, 25^\circ \text{C}} \text{Nuc-CH}_3 + \text{I}^- \] ### Table of Nucleophile Properties: | Nucleophile Name | \( pK_a \) of Conjugate Acid | \( k \) (second order rate constant) \\ |------------------|-------------------------------|---------------------------------------| | \( \text{I}^- \) | -10 | \( 3.4 \times 10^{-3} \, \text{M}^{-1} \cdot \text{s}^{-1} \) | | \( \text{Cl}^- \) | -6 | \( 3.0 \times 10^{-6} \, \text{M}^{-1} \cdot \text{s}^{-1} \) | ### Explanation: - **Nucleophile Name:** Represents the reactive species that donates an electron pair in the reaction. - **\( pK_a \) of Conjugate Acid:** Indicates the strength of the conjugate acid; a lower \( pK_a \) suggests a stronger acid. - **\( k \):** This is the second-order rate constant for the reaction, measured in \(\text{M}^{-1} \cdot \text{s}^{-1}\), indicating the rate at which the reaction proceeds with different nucleophiles. In this case, iodide (\(\text{I}^-\)) is a more effective nucleophile than chloride (\(\text{Cl}^-\)) under the given conditions, as shown by the greater rate constant \( k \) for iodide.
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