IUPAC Name of C₂H₅Cl | chloroethane

What is the IUPAC name of C₂H₅Cl?

The IUPAC name of C₂H₅Cl is chloroethane. It is a halide with a 2-carbon parent chain (ethane) with a chloro at position 1 substituent.

FormulaC₂H₅Cl
IUPAC Namechloroethane
Compound ClassHalide
Parent Chainethane (2 carbons)
Substituentschloro at C1
DifficultyIntermediate

Step 1: Identify the Parent Chain

The longest continuous carbon chain in C₂H₅Cl contains 2 carbon atoms, giving the parent name ethane. The parent chain is numbered to give the halogen substituent the lowest possible locant.

Step 2: Number and Name Substituents

Number the parent chain so that substituents receive the lowest possible locants. chloroethane has one substituent:

Step 3: Assemble the IUPAC Name

Combine the substituent locants and names (in alphabetical order) as prefixes to the parent chain name. If two or more identical substituents are present, use the multiplying prefixes di-, tri-, tetra-, etc. The complete IUPAC name is chloroethane.

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