What is the IUPAC Name of CH3–CH2–CH2–CH2–CH3?
CH3–CH2–CH2–CH2–CH3 is a simple straight-chain hydrocarbon. In this post, we will learn how to name it using IUPAC rules, provide an example image, and understand the structure in detail for NEET and board exam preparation.
🔹 Step-by-Step Naming of CH3–CH2–CH2–CH2–CH3
- Step 1: Count the number of carbon atoms
This molecule has 5 carbon atoms in a straight chain. - Step 2: Identify the type of hydrocarbon
It contains only single bonds (C–C). So, it is an alkane. - Step 3: Use the root name
The root word for 5 carbon atoms is “pent”. - Step 4: Add the suffix
For alkanes, the suffix is “-ane”.
✅ Final IUPAC Name: Pentane
🔸 Structural Formula of Pentane
Pentane is a straight-chain alkane with the formula C5H12. The image above shows the linear structure of pentane. All the bonds are single covalent bonds (sigma bonds), which allow free rotation.
🔍 Example for Better Understanding
Let’s look at the names of similar compounds to understand the pattern:
| Formula | No. of Carbon Atoms | IUPAC Name |
|---|---|---|
| CH4 | 1 | Methane |
| CH3–CH3 | 2 | Ethane |
| CH3–CH2–CH3 | 3 | Propane |
| CH3–CH2–CH2–CH3 | 4 | Butane |
| CH3–CH2–CH2–CH2–CH3 | 5 | Pentane |
📌 Isomers of Pentane
Pentane has 3 structural isomers:
- n-Pentane: straight chain (our main compound)
- Isopentane (methylbutane): branched at second carbon
- Neopentane (dimethylpropane): central carbon with 4 branches
These isomers have the same molecular formula (C5H12) but different structures and properties.
📚 Important Points for NEET & Board Exams
- Alkanes follow the general formula CnH2n+2.
- Only single bonds = saturated hydrocarbons.
- Pentane is colorless, flammable, and used as a solvent in labs.
- Know the IUPAC names from 1 to 10 carbon atoms.
🔗 Related Topics:
- IUPAC Nomenclature - Rules and Practice
- Hydrocarbons: Alkanes, Alkenes & Alkynes
- NEET Chemistry Full Preparation
🧪 Summary
The IUPAC name of CH3–CH2–CH2–CH2–CH3 is Pentane. It is a straight-chain alkane with five carbon atoms and twelve hydrogen atoms. Understanding its structure and naming rules helps you master organic chemistry basics.
🔔 Don’t forget to bookmark our site for more NEET Chemistry Notes!
No comments:
Post a Comment