Which substituent would be assigned the highest priority when naming an alkene E or Z? CH2 -C CI CH3 - С-н CH2CH3 CH3 -C-H CH3 CH2CI - С-н CH2CH3

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Chapter1: Chemical Foundations
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**Question 4**

Which substituent would be assigned the highest priority when naming an alkene E or Z?

1. ![CH2=C-Cl](https://latex.codecogs.com/svg.image?\small&space;\text{CH}_2=C-Cl)

2. ![CH3-CH-CH2CH3](https://latex.codecogs.com/svg.image?\small&space;\text{CH}_3-\overset{\text{H}}{\underset{|}{\text{C}}}-\text{CH}_2\text{CH}_3)
   
3. ![CHO](https://latex.codecogs.com/svg.image?\small&space;\overset{\text{O}}{\underset{|}{\text{C}}}-\text{H})
   
4. ![CH3-C-CH3](https://latex.codecogs.com/svg.image?\small&space;\text{CH}_3-\overset{\text{H}}{\underset{|}{\text{C}}}-\text{CH}_3)
   
5. ![CH2Cl-CH-CH2CH3](https://latex.codecogs.com/svg.image?\small&space;\text{CH}_2\text{Cl}-\overset{\text{H}}{\underset{|}{\text{C}}}-\text{CH}_2\text{CH}_3)

**Explanation:**

This question assesses the ability to prioritize substituents according to CIP (Cahn-Ingold-Prelog) rules for determining stereochemistry. Higher atomic numbers are given greater priority. Here, examine each substituent and decide which has the highest atomic weight or most complex structure leading to higher priority when using E/Z nomenclature for alkenes.
Transcribed Image Text:**Question 4** Which substituent would be assigned the highest priority when naming an alkene E or Z? 1. ![CH2=C-Cl](https://latex.codecogs.com/svg.image?\small&space;\text{CH}_2=C-Cl) 2. ![CH3-CH-CH2CH3](https://latex.codecogs.com/svg.image?\small&space;\text{CH}_3-\overset{\text{H}}{\underset{|}{\text{C}}}-\text{CH}_2\text{CH}_3) 3. ![CHO](https://latex.codecogs.com/svg.image?\small&space;\overset{\text{O}}{\underset{|}{\text{C}}}-\text{H}) 4. ![CH3-C-CH3](https://latex.codecogs.com/svg.image?\small&space;\text{CH}_3-\overset{\text{H}}{\underset{|}{\text{C}}}-\text{CH}_3) 5. ![CH2Cl-CH-CH2CH3](https://latex.codecogs.com/svg.image?\small&space;\text{CH}_2\text{Cl}-\overset{\text{H}}{\underset{|}{\text{C}}}-\text{CH}_2\text{CH}_3) **Explanation:** This question assesses the ability to prioritize substituents according to CIP (Cahn-Ingold-Prelog) rules for determining stereochemistry. Higher atomic numbers are given greater priority. Here, examine each substituent and decide which has the highest atomic weight or most complex structure leading to higher priority when using E/Z nomenclature for alkenes.
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The substituents given are,

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