The Question is from neet-chemistry coordination-compounds iupac-nomenclature, and it was created by the author A.RAMA NAGESWARARAO

Question

What is the IUPAC name of $CH_3CH(CH_3)CH_3$?

A.RAMA NAGESWARARAO · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
	**Primary Concept**: IUPAC nomenclature of alkanes
	**Related Topics**: Alkyl groups, branched alkanes
	**Prerequisites**: Understanding of carbon chain selection, numbering, and naming alkyl substituents.
## SOLUTION PATHWAY
**Given Information**:
	Chemical formula: $CH_3CH(CH_3)CH_3$
	Important conditions:  Need to determine the longest carbon chain and identify any substituents.
**Method & Steps**:
	1. Identify the longest continuous carbon chain. In this case, it's a propane chain (3 carbons).
		Reasoning:  We look for the longest possible straight chain of carbon atoms.
		Formula/Rule:  The longest chain determines the parent alkane name.
	2. Number the carbon atoms in the longest chain, starting from the end closest to the substituent.  We number from left to right to give the substituent the lowest possible number.
		Working:  The methyl group ($CH_3$) is attached to the second carbon atom.
		Key Point:  Numbering is crucial for correct IUPAC naming.  Always choose the numbering that gives the substituent the smallest number.
	3. Name the compound. The longest chain is propane, and we have a methyl group on carbon 2.  Therefore, the name is 2-methylpropane.
		Result: 2-methylpropane
		Verification: Check the longest chain and the position of the substituent.
## OPTION ANALYSIS
A :x: Butane has four carbons in a straight chain.  The given molecule has only three carbons in its longest chain.
B ✓: 2-Methylpropane correctly identifies the longest chain (propane) and the position of the methyl substituent.
C :x: 2-Methylbutane implies a four-carbon main chain (butane), which is incorrect.
D :x: Pentane has five carbons; the given molecule has only three carbons in its longest chain.
## LEARNING AIDS
	**Common Mistakes**:
		1. Incorrect identification of the longest carbon chain: Carefully examine the molecule to find the longest continuous carbon chain.
		2. Incorrect numbering of the carbon chain: Always start numbering from the end that gives the substituents the lowest possible numbers.
	**Quick Tips**:
		1. Always draw the molecule to visualize the carbon skeleton.
		2. Practice naming various branched alkanes to improve proficiency.

A.RAMA NAGESWARARAO · Answer

Butane

A.RAMA NAGESWARARAO · Answer

The correct Option is "2-Methylpropane"

A.RAMA NAGESWARARAO · Answer

2-Methylbutane

A.RAMA NAGESWARARAO · Answer

Pentane

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