Lesson plan 2 Calcium Blookers and Heart Muscle Relaxation

 

Lesson 2: Chemical Structure of Diltiazem

Objectives:

• Understand the chemical formula and structure of diltiazem.
• Identify and describe the functional groups in diltiazem.
• Explain the role of each functional group in the molecule’s activity.

Materials Needed:

• Whiteboard and markers
• Handouts with diltiazem's chemical structure
• Molecular model kit (optional)

Lesson Plan:

1. Introduction (5 minutes)

   • Briefly review what was covered in the previous lesson (introduction to diltiazem and its uses).
   • Introduce today’s focus: the chemical structure of diltiazem.

2. Understanding Chemical Formulas and Structures (10 minutes)

   • Explain what a chemical formula is: a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound.
   • Show the chemical formula for diltiazem: C22H26N2O4S.
   • Break down the formula: 22 carbon (C) atoms, 26 hydrogen (H) atoms, 2 nitrogen (N) atoms, 4 oxygen (O) atoms, and 1 sulfur (S) atom.

3. Drawing and Labeling Diltiazem’s Structure (15 minutes)

   • Draw the structure of diltiazem on the whiteboard or provide a printed handout.
   • Point out and label the key functional groups:
     • Benzene Ring: Highlight the stability and role in the molecule.
     • Ester Group: Explain its structure (R-CO-O-R') and involvement in hydrogen bonding.
     • Thiazepine Ring: Describe the seven-membered ring with sulfur and nitrogen, and its importance in drug interaction.
     • Amine Group: Discuss its role in forming hydrogen bonds and ionic interactions.

4. Role of Functional Groups (15 minutes)

   • Benzene Ring:
     • Discuss aromaticity and stability.
     • Explain how the benzene ring helps position the molecule correctly in the binding site.
   • Ester Group:
     • Discuss its ability to participate in hydrogen bonding and dipole interactions.
   • Thiazepine Ring:
     • Explain the importance of sulfur and nitrogen in drug activity.
     • Describe how the three-dimensional shape of the ring fits into the calcium channel binding pocket.
   • Amine Group:
     • Discuss its role in forming hydrogen bonds and ionic interactions with the calcium channel.

5. Activity: Build a Molecular Model (optional, 20 minutes)

   • Using a molecular model kit, have students build the structure of diltiazem.
   • Ensure students correctly place each functional group and understand their spatial orientation.
   • Discuss how the 3D structure influences the molecule’s interaction with calcium channels.

6. Summary and Q&A (10 minutes)

   • Recap the key points covered:
     • Chemical formula and structure of diltiazem.
     • Importance and role of each functional group.
   • Open the floor for questions to clarify any doubts.

7. Homework/Assessment

   • Assign students to draw and label the structure of diltiazem, highlighting the functional groups.
   • Short essay: Explain how the structure of diltiazem helps it function as a calcium channel blocker.

Glossary:

1. Chemical Formula: A representation of a substance using symbols for its constituent elements.
2. Benzene Ring: A ring-shaped organic compound with alternating double bonds, providing stability and rigidity to the molecule.
3. Ester Group: A functional group with the structure R-CO-O-R', involved in hydrogen bonding.
4. Thiazepine Ring: A seven-membered ring containing sulfur and nitrogen, important for drug interactions.
5. Amine Group: A functional group containing nitrogen, capable of forming hydrogen bonds and ionic interactions.
6. Aromaticity: A property of cyclic (ring-shaped), planar (flat) structures with a ring of resonance bonds that leads to enhanced stability.
7. Hydrogen Bond: A weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
8. Ionic Interaction: An electrostatic attraction between oppositely charged ions or molecules.

This lesson plan provides a detailed approach to understanding the chemical structure of diltiazem, suitable for grade 10 chemistry students.