1. 2. OH 1. OH 2. + a Proton transfer b = Lewis acid/base c = Electrophilic addition 12 Br₂ H₂O NaHCO3 + HBr H₂O d = E1 Elimination e = E2 Elimination + CO₂ + Nal The rections above involve synthesis or reactions of alcohols and ethers. Identify the mechanism by which they proceed from among the mechanisms listed. Use the letters a-g for your answers. f = SN1 Nucleophilic substitution gSN2 Nucleophilic substitution

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**Transcription of Chemical Reaction Mechanisms**

1. **Reaction 1:**
   - Reactants: An alcohol group and Br₂ in the presence of H₂O.
   - Products: A cyclic bromide with the formation of HBr.

2. **Reaction 2:**
   - Reactants: An alcohol group with I₂ and NaHCO₃.
   - Products: A cyclic iodide, along with H₂O, CO₂, and NaI.

**Mechanism Descriptions:**
- **a = Proton transfer**: Movement of a proton (H⁺) between two species.
- **b = Lewis acid/base**: Interaction between a Lewis acid (electron pair acceptor) and a Lewis base (electron pair donor).
- **c = Electrophilic addition**: Addition of an electrophile to a substrate.
- **d = E1 Elimination**: Unimolecular elimination involving the loss of a leaving group followed by deprotonation.
- **e = E2 Elimination**: Bimolecular elimination involving simultaneous deprotonation and loss of a leaving group.
- **f = Sₙ1 Nucleophilic substitution**: Unimolecular nucleophilic substitution involving formation of a carbocation intermediate.
- **g = Sₙ2 Nucleophilic substitution**: Bimolecular nucleophilic substitution involving a direct displacement mechanism.

**Task Prompt:**
Identify the mechanism by which each reaction proceeds from the listed mechanisms using the letters a - g for your answers.

1. [ ]
2. [ ]

(Note: Fill the brackets with the correct mechanism letter.)
Transcribed Image Text:**Transcription of Chemical Reaction Mechanisms** 1. **Reaction 1:** - Reactants: An alcohol group and Br₂ in the presence of H₂O. - Products: A cyclic bromide with the formation of HBr. 2. **Reaction 2:** - Reactants: An alcohol group with I₂ and NaHCO₃. - Products: A cyclic iodide, along with H₂O, CO₂, and NaI. **Mechanism Descriptions:** - **a = Proton transfer**: Movement of a proton (H⁺) between two species. - **b = Lewis acid/base**: Interaction between a Lewis acid (electron pair acceptor) and a Lewis base (electron pair donor). - **c = Electrophilic addition**: Addition of an electrophile to a substrate. - **d = E1 Elimination**: Unimolecular elimination involving the loss of a leaving group followed by deprotonation. - **e = E2 Elimination**: Bimolecular elimination involving simultaneous deprotonation and loss of a leaving group. - **f = Sₙ1 Nucleophilic substitution**: Unimolecular nucleophilic substitution involving formation of a carbocation intermediate. - **g = Sₙ2 Nucleophilic substitution**: Bimolecular nucleophilic substitution involving a direct displacement mechanism. **Task Prompt:** Identify the mechanism by which each reaction proceeds from the listed mechanisms using the letters a - g for your answers. 1. [ ] 2. [ ] (Note: Fill the brackets with the correct mechanism letter.)
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