(a) :Br: Shein H₂O: E1 Reaction

Chemistry
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Chapter1: Chemical Foundations
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What are the major products of the reaction shown below? Draw the curved arrow notation to show the formation of products
### Transcription and Explanation  

#### Image Description:
The image presents a chemical equation that involves an elimination reaction, specifically an E1 (unimolecular elimination) reaction.

#### Components:
(a) The left side of the image shows a structural formula of a molecule:
- **A benzene ring** (phenyl group) is attached to a two-carbon chain.
- The second carbon atom in the chain is bonded to a bromine atom (Br), which is highlighted with three lone pairs of electrons.

#### Reaction:
- An arrow labeled “E1 Reaction” points from the reactant to the products.
- Above the arrow, “H₂O” is indicated, suggesting that water is involved in the reaction.

### Overview of the E1 Reaction:
- **E1 Mechanism**: 
  - The reaction proceeds in two steps. The bond between the carbon and the leaving group (bromine) breaks first, forming a carbocation intermediate.
  - Then, a base (which could be the water) abstracts a proton from the adjacent carbon, leading to the formation of a double bond.

### Educational Context:
This image and explanation can be used in a chemistry educational resource to demonstrate the concept of an E1 reaction, explain the structural changes in the reaction, and elucidate the role of leaving groups and intermediates in organic reactions.
Transcribed Image Text:### Transcription and Explanation #### Image Description: The image presents a chemical equation that involves an elimination reaction, specifically an E1 (unimolecular elimination) reaction. #### Components: (a) The left side of the image shows a structural formula of a molecule: - **A benzene ring** (phenyl group) is attached to a two-carbon chain. - The second carbon atom in the chain is bonded to a bromine atom (Br), which is highlighted with three lone pairs of electrons. #### Reaction: - An arrow labeled “E1 Reaction” points from the reactant to the products. - Above the arrow, “H₂O” is indicated, suggesting that water is involved in the reaction. ### Overview of the E1 Reaction: - **E1 Mechanism**: - The reaction proceeds in two steps. The bond between the carbon and the leaving group (bromine) breaks first, forming a carbocation intermediate. - Then, a base (which could be the water) abstracts a proton from the adjacent carbon, leading to the formation of a double bond. ### Educational Context: This image and explanation can be used in a chemistry educational resource to demonstrate the concept of an E1 reaction, explain the structural changes in the reaction, and elucidate the role of leaving groups and intermediates in organic reactions.
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In the E1 mechanism there are usually two steps involved – ionization and deprotonation. During ionization, there is a formation of carbocation as an intermediate. In deprotonation, a proton is lost by the carbocation.

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