Identify the following reactions as additions, eliminations, substitutions, or rearrangements. a) b) C) Br + + Br₂ NaOH O₂N-NO₂ light Br 'Br NO₂ (+ H2O + NaBr) (+ HNO₂)

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**Title: Reaction Identification in Organic Chemistry**

**Objective:** Identify the following reactions as additions, eliminations, substitutions, or rearrangements.

---

**Reaction A:**

- **Reactants:** 2-Bromo-2-methylpropane and NaOH
- **Products:** 2-Methylpropene, water (H₂O), and sodium bromide (NaBr)
- **Reaction Type:** 
  - **Analysis:** The reactant 2-Bromo-2-methylpropane undergoes an elimination reaction with NaOH. The bromine (Br) and a hydrogen atom are removed, forming 2-Methylpropene. This reaction also produces water and sodium bromide as by-products.

**Reaction B:**

- **Reactants:** Cyclohexene and Br₂
- **Products:** 1,2-Dibromocyclohexane
- **Reaction Type:** 
  - **Analysis:** Cyclohexene reacts with bromine (Br₂) to form 1,2-Dibromocyclohexane. This is an example of an addition reaction where the double bond in cyclohexene opens up to accommodate two bromine atoms.

**Reaction C:**

- **Reactants:** Cyclohexane and dinitrogen tetroxide (O₂N–NO₂), in the presence of light
- **Products:** Nitrocyclohexane and nitrous acid (HNO₂)
- **Reaction Type:** 
  - **Analysis:** Cyclohexane undergoes a substitution reaction with dinitrogen tetroxide under the influence of light, resulting in nitrocyclohexane. The reaction also produces nitrous acid as a by-product.

---

**Diagrams and Explanation:**

- Each reaction is depicted with a structural formula of reactants and products.
- Arrows indicate the transformation process from reactants to products.
- By-products (such as water and sodium bromide) are mentioned next to the main reaction products.
- Options are provided to select the type of reaction (addition, elimination, substitution, or rearrangement) for each example.

This exercise helps in understanding the fundamental types of reactions in organic chemistry and their implications on molecular structures.
Transcribed Image Text:**Title: Reaction Identification in Organic Chemistry** **Objective:** Identify the following reactions as additions, eliminations, substitutions, or rearrangements. --- **Reaction A:** - **Reactants:** 2-Bromo-2-methylpropane and NaOH - **Products:** 2-Methylpropene, water (H₂O), and sodium bromide (NaBr) - **Reaction Type:** - **Analysis:** The reactant 2-Bromo-2-methylpropane undergoes an elimination reaction with NaOH. The bromine (Br) and a hydrogen atom are removed, forming 2-Methylpropene. This reaction also produces water and sodium bromide as by-products. **Reaction B:** - **Reactants:** Cyclohexene and Br₂ - **Products:** 1,2-Dibromocyclohexane - **Reaction Type:** - **Analysis:** Cyclohexene reacts with bromine (Br₂) to form 1,2-Dibromocyclohexane. This is an example of an addition reaction where the double bond in cyclohexene opens up to accommodate two bromine atoms. **Reaction C:** - **Reactants:** Cyclohexane and dinitrogen tetroxide (O₂N–NO₂), in the presence of light - **Products:** Nitrocyclohexane and nitrous acid (HNO₂) - **Reaction Type:** - **Analysis:** Cyclohexane undergoes a substitution reaction with dinitrogen tetroxide under the influence of light, resulting in nitrocyclohexane. The reaction also produces nitrous acid as a by-product. --- **Diagrams and Explanation:** - Each reaction is depicted with a structural formula of reactants and products. - Arrows indicate the transformation process from reactants to products. - By-products (such as water and sodium bromide) are mentioned next to the main reaction products. - Options are provided to select the type of reaction (addition, elimination, substitution, or rearrangement) for each example. This exercise helps in understanding the fundamental types of reactions in organic chemistry and their implications on molecular structures.
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