3. Predict the molecular geometries and bond angles around the atoms designated with an arrow in glycine, an amino acid. в H -N- H. O: D :0

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### Problem 3: Molecular Geometry and Bond Angles in Glycine

**Task**: Predict the molecular geometries and bond angles around the atoms designated with an arrow in glycine, an amino acid.

**Diagram Explanation**:
- The structure shown is of the glycine molecule, an amino acid.
- Each arrow (A, B, C, D) points to specific atoms in the molecule.

**Arrow Designations**:
- **A**: Points to the nitrogen atom (N) bonded to two hydrogen atoms (H) and one carbon atom (C).
- **B**: Points to a carbon atom (C) bonded to one hydrogen atom (H), the amino nitrogen (N), and a central carbon atom (C).
- **C**: Points to the central carbon atom (C) of the carboxylic acid group bonded to another carbon, oxygen, and hydroxyl (OH) group.
- **D**: Points to the oxygen atom (O) in the hydroxyl group (OH).

**Molecular Geometries and Bond Angles**:
- **A (Nitrogen atom)**: 
  - **Geometry**: Trigonal pyramidal 
  - **Bond Angles**: Approximately 107°

- **B (Carbon atom bonded to nitrogen)**:
  - **Geometry**: Tetrahedral 
  - **Bond Angles**: Approximately 109.5°

- **C (Central carbon atom of the carboxylic group)**:
  - **Geometry**: Trigonal planar 
  - **Bond Angles**: Approximately 120°

- **D (Oxygen atom of the hydroxyl group)**:
  - **Geometry**: Bent
  - **Bond Angles**: Approximately 104.5°

This structural understanding is critical for recognizing how amino acids interact and form proteins, impacting their biological functions.
Transcribed Image Text:### Problem 3: Molecular Geometry and Bond Angles in Glycine **Task**: Predict the molecular geometries and bond angles around the atoms designated with an arrow in glycine, an amino acid. **Diagram Explanation**: - The structure shown is of the glycine molecule, an amino acid. - Each arrow (A, B, C, D) points to specific atoms in the molecule. **Arrow Designations**: - **A**: Points to the nitrogen atom (N) bonded to two hydrogen atoms (H) and one carbon atom (C). - **B**: Points to a carbon atom (C) bonded to one hydrogen atom (H), the amino nitrogen (N), and a central carbon atom (C). - **C**: Points to the central carbon atom (C) of the carboxylic acid group bonded to another carbon, oxygen, and hydroxyl (OH) group. - **D**: Points to the oxygen atom (O) in the hydroxyl group (OH). **Molecular Geometries and Bond Angles**: - **A (Nitrogen atom)**: - **Geometry**: Trigonal pyramidal - **Bond Angles**: Approximately 107° - **B (Carbon atom bonded to nitrogen)**: - **Geometry**: Tetrahedral - **Bond Angles**: Approximately 109.5° - **C (Central carbon atom of the carboxylic group)**: - **Geometry**: Trigonal planar - **Bond Angles**: Approximately 120° - **D (Oxygen atom of the hydroxyl group)**: - **Geometry**: Bent - **Bond Angles**: Approximately 104.5° This structural understanding is critical for recognizing how amino acids interact and form proteins, impacting their biological functions.
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