Learning Path
Question & Answer
Choose the Best Answer
1-bromo-3-ethylcyclohexane
3-bromo-1-ethylcyclohexane
1-ethyl-3-bromocyclohexane
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
Cycloalkanes Naming
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Deep Dive: Cycloalkanes Naming
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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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