The IUPAC name of allyl chloride is

Options

A. 1-Chloroethane
B. 3-Chloro-1-propyne
C. 3-Chloro-1-propene
D. 1-Chloropropene

Explanation

To determine the IUPAC name of allyl chloride, we will follow these steps:

### Step 1: Identify the structure of allyl chloride
Allyl chloride consists of an allyl group (CH2=CH-CH2-) with a chlorine atom attached to the carbon chain. The structure can be represented as CH2=CH-CHCl2.

### Step 2: Determine the longest carbon chain
The longest carbon chain in allyl chloride contains three carbon atoms. Therefore, the parent hydrocarbon is propane.

### Step 3: Identify the functional group
The functional group in this case is the chlorine atom (Cl), which is a halogen.

### Step 4: Number the carbon chain
When numbering the carbon chain, we start from the end closest to the double bond to give the lowest possible number to the double bond. The numbering will be as follows:
- C1: CH2 (double bond)
- C2: CH (double bond)
- C3: CH2Cl

### Step 5: Assign locants to the substituents
The chlorine atom is attached to the third carbon atom in the chain. Therefore, we denote it as "3-chloro".

### Step 6: Indicate the presence of the double bond
Since there is a double bond between the first and second carbon atoms, we indicate this in the name. The double bond is located at the first carbon, so we will use "prop-1-ene" to indicate the presence of the double bond.

### Step 7: Combine the parts to form the IUPAC name
Combining all the parts, we get the full IUPAC name: **3-chloroprop-1-ene**.

### Final Answer:
The IUPAC name of allyl chloride is **3-chloroprop-1-ene**.

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