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Cycloalkanes Naming
hard

In a bicyclic cycloalkane derivative with two methyl substituents, one on each of the fused rings, determine the correct cis or trans configuration if one methyl is on the equatorial plane of one ring and the other is axial on the adjacent ring. Which configuration is represented?

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Learning Path
Learning Path

Question & Answer
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Choose AnswerChoose the Best Answer

A

Cis

B

Trans

C

Neither

D

Both

Understanding the Answer

Let's break down why this is correct

The methyl on the equatorial plane points downward relative to the ring’s plane. Other options are incorrect because Some might think cis because the rings look similar on the surface; It is a misconception that flipping the rings changes the cis/trans relationship.

Key Concepts

Cycloalkane Derivatives
Cis-Trans Isomerism
Substituent Identification
Topic

Cycloalkanes Naming

Difficulty

hard 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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