Contextualization

Organic reactions are a fundamental concept in Chemistry and play an important role in many aspects of everyday life and technology. A particularly important class of organic reactions is elimination reactions, which involve the removal of atoms or groups of atoms from an organic molecule.

At a more advanced level, elimination reactions are powerful tools in organic synthesis, allowing chemists to create a wide variety of complex molecules from simpler precursors. This has significant implications for the manufacturing of products, from medicines to advanced materials.

Understanding elimination reactions is therefore crucial for any chemistry student who wants to understand how organic reactions work and how they can be applied in a real context.

In today's world, where chemistry is relevant in many fields - from medicine to technology, through environmental sustainability - having a solid understanding of elimination reactions is essential. For example, many industrial and pharmaceutical processes rely on elimination reactions. Furthermore, in Green Chemistry, an emerging branch focused on designing chemical products and processes that reduce or eliminate the production of harmful substances, elimination reactions are fundamental.

To assist in understanding and deepening the topic, we recommend the following literature:

• Atkins, P. and Jones, L. "Princípios de Química: Questionando a Vida Moderna e o Meio Ambiente". Bookman, 2012.
• Brown, T. L., LeMay, H. E., Bursten, B. E., Murphy, C. J. and Woodward, P. M. "Química: A Ciência Central". Pearson, 2012.

Additionally, visit the Khan Academy website, which offers an excellent section on organic reactions, including elimination reactions. Available at: Khan Academy - Reações orgânicas

Practical Activity

Activity Title: Unraveling Elimination Reactions

Activity Objective:

The objective of this activity is to provide students with a more solid understanding of elimination reactions, including their main characteristics, use of catalysts, synthetic routes, and products, through guided investigation and group experimentation.

Activity Description:

This activity is divided into two parts:

Part I - Research

Each group will be responsible for investigating a specific type of elimination reaction. The groups will research and collect information on:

• The theory behind the type of reaction
• An example of practical application of this reaction in the industry
• A description of the reaction mechanism
• The types of catalysts used
• The reaction product(s) and their possible applications

Part II - Simulation

After collecting the above information, students will create a simulation of the elimination reaction they investigated, using molecular modeling (software or physical modeling kits) to represent the reaction, its products, and catalysts.

Required Materials:

• Internet access for research
• Notebook and pen for notes
• Computer with molecular modeling software or a physical molecular modeling kit

Step by Step:

1. Divide the class into groups of 3 to 5 students.
2. Assign each group a specific type of elimination reaction to investigate.
3. Instruct the groups to research and collect information about the assigned reaction type, ensuring to address all points mentioned in the "Activity Description" section.
4. After the research, groups should use a molecular modeling program or a modeling kit to simulate the elimination reaction they investigated.
5. Groups should document the entire process, from their initial research to the final simulation, including images or screenshots of their simulations.
6. Groups should write a report, following the guidelines below, to conclude the activity.

Deliverables:

Project Report: Each group must prepare a detailed report on the activity, which should include:

1. Introduction: In this section, students should introduce the topic, explain the relevance of elimination reactions, and contextualize the specific reaction they investigated.
2. Development: Students should explain the theory behind the reaction they investigated, detail the activity performed (including research and simulation), present the methodology used for research and simulation, discuss the results obtained, and reflect on the challenges faced and how they overcame them.
3. Conclusion: Students should reaffirm the main points of the report, reflect on what they learned through the project, and discuss possible applications and implications of the investigated elimination reaction.
4. Bibliography: Here, students should cite all sources used for their research, including books, websites, videos, etc.

The project reports will be evaluated based on the depth of research, the clarity and organization of the report, the quality of the simulation, and the reflection and connection to real-world applications. Teamwork will also be evaluated.