Classify each of the following reactions as a substitution, elimination or addition reaction: Br Нeat (a) + Br2 HBr Br CN (b) CN Br Br (c) Br2 Br

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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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### Classifying Chemical Reactions

**Objective:** Classify each of the following reactions as a substitution, elimination, or addition reaction.

#### Reaction (a):

- **Reactants:** Benzene (\(C_6H_6\)) and Bromine (\(Br_2\))
- **Conditions:** Heat
- **Products:** Bromobenzene (\(C_6H_5Br\)) and Hydrogen Bromide (HBr)

**Explanation of Reaction:**
This reaction represents a substitution reaction. The bromine replaces one of the hydrogen atoms in the benzene ring, forming bromobenzene and hydrogen bromide.

#### Reaction (b):

- **Reactants:** Bromobenzene (\(C_6H_5Br\)) and Cyanide ion (\(CN^-\))
- **Products:** Benzonitrile (\(C_6H_5CN\)) and Bromide ion (\(Br^-\))

**Explanation of Reaction:**
This is a substitution reaction. The cyanide ion replaces the bromine atom in bromobenzene, resulting in the formation of benzonitrile and a bromide ion.

#### Reaction (c):

- **Reactants:** Benzene (\(C_6H_6\)) and Bromine (\(Br_2\))
- **Products:** 1,2-Dibromocyclohexane

**Explanation of Reaction:**
This reaction is an addition reaction. The bromine adds across the double bond in benzene, resulting in the formation of 1,2-dibromocyclohexane.
Transcribed Image Text:### Classifying Chemical Reactions **Objective:** Classify each of the following reactions as a substitution, elimination, or addition reaction. #### Reaction (a): - **Reactants:** Benzene (\(C_6H_6\)) and Bromine (\(Br_2\)) - **Conditions:** Heat - **Products:** Bromobenzene (\(C_6H_5Br\)) and Hydrogen Bromide (HBr) **Explanation of Reaction:** This reaction represents a substitution reaction. The bromine replaces one of the hydrogen atoms in the benzene ring, forming bromobenzene and hydrogen bromide. #### Reaction (b): - **Reactants:** Bromobenzene (\(C_6H_5Br\)) and Cyanide ion (\(CN^-\)) - **Products:** Benzonitrile (\(C_6H_5CN\)) and Bromide ion (\(Br^-\)) **Explanation of Reaction:** This is a substitution reaction. The cyanide ion replaces the bromine atom in bromobenzene, resulting in the formation of benzonitrile and a bromide ion. #### Reaction (c): - **Reactants:** Benzene (\(C_6H_6\)) and Bromine (\(Br_2\)) - **Products:** 1,2-Dibromocyclohexane **Explanation of Reaction:** This reaction is an addition reaction. The bromine adds across the double bond in benzene, resulting in the formation of 1,2-dibromocyclohexane.
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