i) Predict the product(s) for the major mechanistic pathw://(s). Show stereochemistry where applicable. If a racemate forms, draw one komer and writte "racemate (This means that if there is an elimination, you only need to draw the major product of that. Or if there is a modure of mechanism types, you would need the major product for each of the types) ) Write if the mechanism goes by SN2, SN1, E2 and/or E1. A. B. Br YMER I Br NaCN CH3OH
i) Predict the product(s) for the major mechanistic pathw://(s). Show stereochemistry where applicable. If a racemate forms, draw one komer and writte "racemate (This means that if there is an elimination, you only need to draw the major product of that. Or if there is a modure of mechanism types, you would need the major product for each of the types) ) Write if the mechanism goes by SN2, SN1, E2 and/or E1. A. B. Br YMER I Br NaCN CH3OH
Transcribed Image Text:### Organic Chemistry Reaction Mechanisms: Worksheet
#### Instructions:
i) Predict the product(s) for the major mechanistic pathway(s). Show stereochemistry where applicable. If a racemate forms, draw one isomer and write "racemate."
(This means that if there is an elimination, you only need to draw the major product of that. Or if there is a mixture of mechanism types, you would need the major product for each of the types.)
ii) Write if the mechanism goes by \( S_{N}2 \), \( S_{N}1 \), E2, and/or E1.
#### Reactions:
- **Figure A:**
A molecule has a Bromine (Br) atom attached to a secondary carbon. It is subjected to a reaction with Sodium Cyanide (NaCN).
**Reaction Mechanism**: \( S_{N}2 \) (Typically the \( S_{N}2 \) mechanism occurs with a strong nucleophile like NaCN)
**Expected Product**:
- The Bromine (Br) will be substituted by the Cyanide (CN) group.
- **Figure B:**
A cyclic molecule with a Bromine (Br) atom attached to a secondary carbon is subjected to a reaction with Methanol (CH\(_3\)OH).
**Reaction Mechanism**: \( S_{N}1 \) (Typically the \( S_{N}1 \) mechanism occurs with a weak nucleophile like CH\(_3\)OH and could proceed with carbocation formation).
**Expected Product**:
- The Bromine (Br) will be substituted by the Methoxy (OCH\(_3\)) group.
### Diagrams:
- Both figures A and B show the structure of the organic molecules before the reaction. The Br (Bromine) atom has been placed on a secondary carbon and is represented in wedge notation to indicate stereochemistry.
#### Note:
* Ensure that in practical applications you consider the reaction conditions and solvents, as they can dramatically influence the pathway (SN2 vs SN1, E2 vs E1).
Transcribed Image Text:### Organic Chemistry Reactions Overview
### Reaction Analysis
#### Reaction B:
The structure shown consists of a cycloalkane ring where one of the carbon atoms is bonded to a bromine atom (Br).
**Reagent:** CH₃OH (Methanol)
**Diagram description:**
- A cycloalkane with the molecular formula including a bromine substituent.
- An arrow indicating the reaction direction, labeled with CH₃OH.
**Interpretation:**
The given reaction suggests a substitution where methanol likely acts as a nucleophile, replacing the bromine atom on the cycloalkane.
---
#### Reaction C:
The structure depicted is a straight-chain alkyl group terminated with a carbon-bromine (C-Br) bond.
**Reagent:** (CH₃)₃OK (Potassium tert-butoxide)
**Diagram description:**
- A straight-chain carbon skeleton with a bromine substituent.
- A reaction arrow labeled with (CH₃)₃OK indicating the direction of the reaction.
**Interpretation:**
This is likely an elimination reaction where potassium tert-butoxide induces the removal of the bromine atom, leading to the formation of an alkene due to the strong basic nature of the reagent.
### Summary
These reactions demonstrate common organic chemistry transformations — nucleophilic substitution and elimination — with specific reagents (methanol and potassium tert-butoxide) to achieve the desired chemical changes.
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