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Cycloalkanes Naming
easy

Consider a cyclohexane molecule with two substituents: a bromine atom located at the 1-position and an ethyl group at the 3-position. How would you correctly name this compound following IUPAC conventions?

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Learning Path
Learning Path

Question & Answer
1
Understand Question
2
Review Options
3
Learn Explanation
4
Explore Topic

Choose AnswerChoose the Best Answer

A

1-bromo-3-ethylcyclohexane

B

3-bromo-1-ethylcyclohexane

C

1-ethyl-3-bromocyclohexane

D

3-ethyl-1-bromocyclohexane

Understanding the Answer

Let's break down why this is correct

The IUPAC rule orders substituents alphabetically, not by their locants. Other options are incorrect because Some students think the substituent with the lowest locant should be listed first; This option reverses the alphabetical order.

Key Concepts

Substituent Identification
Topic

Cycloalkanes Naming

Difficulty

easy level question

Cognitive Level

understand

Deep Dive: Cycloalkanes Naming

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Definition
Definition

Naming cycloalkanes involves adding the prefix 'cyclo-' before the root name, numbering carbons to give substituents the lowest possible numbers, and alphabetically ordering substituents. The naming also includes using prefixes like cis- and trans- based on the orientation of substituents on the ring, with cyclopentanes and cyclohexanes being the most common due to their stability and low ring strain.

Topic Definition

Naming cycloalkanes involves adding the prefix 'cyclo-' before the root name, numbering carbons to give substituents the lowest possible numbers, and alphabetically ordering substituents. The naming also includes using prefixes like cis- and trans- based on the orientation of substituents on the ring, with cyclopentanes and cyclohexanes being the most common due to their stability and low ring strain.

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