The `IUPAC` name of the compound having the formula `CH-=C-CH=CH_(2)` is

Options

A. 1-butene-3-yne
B. 3-buten-1-yne
C. 1-butyn-3-ene
D. but-1-yn-3-ene

Explanation

To determine the IUPAC name of the compound with the formula CH≡C-CH=CH₂, we will follow these steps:

### Step 1: Identify the longest carbon chain
The given compound has a total of 4 carbon atoms. The longest chain is:
- C1: CH (with a triple bond)
- C2: C (with a double bond)
- C3: CH
- C4: CH₂

### Step 2: Number the carbon chain
We need to number the carbon chain in such a way that the double and triple bonds get the lowest possible numbers. Starting from the end closest to the triple bond:
1. C1: CH (triple bond)
2. C2: C (double bond)
3. C3: CH
4. C4: CH₂

So, the numbering is as follows:
- C1: Triple bond
- C2: Double bond
- C3: CH
- C4: CH₂

### Step 3: Identify the types of bonds
- The triple bond is located between C1 and C2.
- The double bond is located between C2 and C3.

### Step 4: Assign the IUPAC name
According to IUPAC nomenclature:
- The root name for 4 carbon atoms is "but".
- Since there is a double bond at C2, we use "ene".
- Since there is a triple bond at C1, we use "yne".

The correct order of naming is to place the double bond before the triple bond in the name. Thus:
- The name will be 1-butyne (for the triple bond) and 2-ene (for the double bond).

Combining these, we get the IUPAC name:
**1-butyne-2-ene**.

### Final Answer:
The IUPAC name of the compound CH≡C-CH=CH₂ is **1-butyne-2-ene**.

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