(CH3CH2)-C-Br + HO- H2O 250 (cH,CHz)C-Br CH3CH2)3 -C-Br 750

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Chapter1: Chemical Foundations
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### Transcription of Chemical Reactions

#### First Reaction
- **Reactants:** 
  - (CH₃CH₂)₃C-Br
  - HO⁻
- **Product Context:** 
  - Water (H₂O) is involved, indicating a likely substitution or elimination reaction.

#### Second Reaction
- **Reactants:** 
  - (CH₃CH₂)₃C-Br
- **Conditions:** 
  - 25°C in methanol (CH₃OH), suggesting a possible solvent or reaction medium for a nucleophilic substitution or similar process.

#### Third Reaction
- **Reactants:** 
  - (CH₃CH₂)₃C-Br
- **Conditions:** 
  - 75°C in methanol (CH₃OH), which may facilitate a more active reaction environment, possibly increasing the reaction rate or altering the reaction pathway (e.g., elimination instead of substitution).

### Explanation
These reactions depict the behavior of a tertiary alkyl halide ((CH₃CH₂)₃C-Br) under various conditions. The presence of different bases or solvents and temperature changes can influence whether the reaction proceeds via substitution or elimination mechanisms. Methanol and water function as solvents, and temperature variations highlight their impact on reaction kinetics and pathways.
Transcribed Image Text:### Transcription of Chemical Reactions #### First Reaction - **Reactants:** - (CH₃CH₂)₃C-Br - HO⁻ - **Product Context:** - Water (H₂O) is involved, indicating a likely substitution or elimination reaction. #### Second Reaction - **Reactants:** - (CH₃CH₂)₃C-Br - **Conditions:** - 25°C in methanol (CH₃OH), suggesting a possible solvent or reaction medium for a nucleophilic substitution or similar process. #### Third Reaction - **Reactants:** - (CH₃CH₂)₃C-Br - **Conditions:** - 75°C in methanol (CH₃OH), which may facilitate a more active reaction environment, possibly increasing the reaction rate or altering the reaction pathway (e.g., elimination instead of substitution). ### Explanation These reactions depict the behavior of a tertiary alkyl halide ((CH₃CH₂)₃C-Br) under various conditions. The presence of different bases or solvents and temperature changes can influence whether the reaction proceeds via substitution or elimination mechanisms. Methanol and water function as solvents, and temperature variations highlight their impact on reaction kinetics and pathways.
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