In each row, select the molecule with the highlighted H atom that is more acidic. H HH H H H H me HH H ey eve H X 000 Ar

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**Title: Identifying More Acidic Hydrogen Atoms in Molecules**

**Instructions:**  
In each row, select the molecule with the highlighted hydrogen (H) atom that is more acidic.

**Molecules Analysis:**

1. **First Row:**
   - Left Molecule: Cyclohexane with one sulfur-hydrogen (S-H) bond.
   - Right Molecule: Cyclohexanol with an oxygen-hydrogen (O-H) bond.
   - More acidic: Cyclohexanol (O-H bond).

2. **Second Row:**
   - Left Molecule: Ethyl mercaptan (S-H bond on the terminal sulfur).
   - Middle Molecule: Ethanol (O-H bond on terminal oxygen).
   - Right Molecule: No molecule provided.
   - More acidic: Generally, ethanol (O-H bond).

3. **Third Row:**
   - Left Molecule: Methanol (O-H bond on the hydroxyl group).
   - Right Molecule: Ethanol (O-H bond on the hydroxyl group).
   - More acidic: Methanol (O-H bond, slightly due to molecular structure).

4. **Fourth Row:**
   - Left Molecule: Propan-1-amine (O-H bond on nitrogen-associated hydrogen).
   - Middle Molecule: Methanol (S-H bond on sulfur).
   - Right Molecule: Ethyl mercaptan (S-H bond on the terminal sulfur).
   - More acidic: Typically, ethanol (O-H bond) or propan-1-amine (due to context).

**Note:**
The acidity of hydrogen atoms in molecules often depends on the surrounding atoms and their ability to stabilize negative charge following deprotonation. Typically, O-H groups are more acidic compared to S-H because oxygen is more electronegative than sulfur, allowing for better stabilization of the conjugate base.
Transcribed Image Text:**Title: Identifying More Acidic Hydrogen Atoms in Molecules** **Instructions:** In each row, select the molecule with the highlighted hydrogen (H) atom that is more acidic. **Molecules Analysis:** 1. **First Row:** - Left Molecule: Cyclohexane with one sulfur-hydrogen (S-H) bond. - Right Molecule: Cyclohexanol with an oxygen-hydrogen (O-H) bond. - More acidic: Cyclohexanol (O-H bond). 2. **Second Row:** - Left Molecule: Ethyl mercaptan (S-H bond on the terminal sulfur). - Middle Molecule: Ethanol (O-H bond on terminal oxygen). - Right Molecule: No molecule provided. - More acidic: Generally, ethanol (O-H bond). 3. **Third Row:** - Left Molecule: Methanol (O-H bond on the hydroxyl group). - Right Molecule: Ethanol (O-H bond on the hydroxyl group). - More acidic: Methanol (O-H bond, slightly due to molecular structure). 4. **Fourth Row:** - Left Molecule: Propan-1-amine (O-H bond on nitrogen-associated hydrogen). - Middle Molecule: Methanol (S-H bond on sulfur). - Right Molecule: Ethyl mercaptan (S-H bond on the terminal sulfur). - More acidic: Typically, ethanol (O-H bond) or propan-1-amine (due to context). **Note:** The acidity of hydrogen atoms in molecules often depends on the surrounding atoms and their ability to stabilize negative charge following deprotonation. Typically, O-H groups are more acidic compared to S-H because oxygen is more electronegative than sulfur, allowing for better stabilization of the conjugate base.
The image contains three sections, each displaying a set of organic chemical structures with selectable options below them. These sections likely represent questions or problems related to identifying molecular structures, functional groups, or stereochemistry. 

1. **First Section (Top):** 
   - Two cyclic structures are shown. The specific details regarding bonds or functional groups are unclear without further context.

2. **Second Section (Middle):**
   - Displays two linear organic molecules. 
   - **Left Structure:** Features an alcohol group (OH) bonded to a chain of carbon atoms. One hydrogen is labeled in red, indicating it may be of special interest.
   - **Right Structure:** Includes a thiol group (SH) bonded to a carbon chain. Again, a hydrogen is highlighted in red.

3. **Third Section (Bottom):**
   - Displays two more linear organic molecules.
   - **Left Structure:** Contains an amine group (NH) with a neighboring hydrogen highlighted in red.
   - **Right Structure:** Similar to the second section, it shows a thiol group (SH) bonded to a carbon chain with a red-labeled hydrogen.

Below each pair of structures, there are circular options which may allow for interactive selection, likely for the purpose of answering questions or making identifications related to the structures presented.
Transcribed Image Text:The image contains three sections, each displaying a set of organic chemical structures with selectable options below them. These sections likely represent questions or problems related to identifying molecular structures, functional groups, or stereochemistry. 1. **First Section (Top):** - Two cyclic structures are shown. The specific details regarding bonds or functional groups are unclear without further context. 2. **Second Section (Middle):** - Displays two linear organic molecules. - **Left Structure:** Features an alcohol group (OH) bonded to a chain of carbon atoms. One hydrogen is labeled in red, indicating it may be of special interest. - **Right Structure:** Includes a thiol group (SH) bonded to a carbon chain. Again, a hydrogen is highlighted in red. 3. **Third Section (Bottom):** - Displays two more linear organic molecules. - **Left Structure:** Contains an amine group (NH) with a neighboring hydrogen highlighted in red. - **Right Structure:** Similar to the second section, it shows a thiol group (SH) bonded to a carbon chain with a red-labeled hydrogen. Below each pair of structures, there are circular options which may allow for interactive selection, likely for the purpose of answering questions or making identifications related to the structures presented.
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