IUPAC name of `(CH_(3))_(2)N-C_(2)H_(5)` is

Options

A. Dimethyl ethyl amine
B. Dimethyl amino methane
C. Dimethyl amino ethane
D. N, N-dimethyl amino ethane

Answer

To determine the IUPAC name of the compound `(CH₃)₂N-C₂H₅`, we will follow these steps:

### Step 1: Identify the Structure
The given compound can be represented as:
- Two methyl groups `(CH₃)₂` attached to a nitrogen atom (N).
- An ethyl group `(C₂H₅)` attached to the nitrogen atom.

### Step 2: Determine the Functional Group
The presence of the nitrogen atom indicates that this compound is an amine. Amines are classified based on the number of carbon groups attached to the nitrogen atom.

### Step 3: Count the Carbon Atoms
- There are two methyl groups (each contributing 1 carbon) and one ethyl group (contributing 2 carbons).
- Total carbon count = 2 (from methyl) + 2 (from ethyl) = 4 carbon atoms.

### Step 4: Name the Alkyl Groups
- The two methyl groups are named as "dimethyl".
- The ethyl group is simply named as "ethyl".

### Step 5: Assign the Position of the Nitrogen
Since the nitrogen is bonded to the ethyl group and the two methyl groups, we need to indicate that the nitrogen is attached to the first carbon of the ethyl group.

### Step 6: Combine the Names
According to IUPAC nomenclature:
- The nitrogen atom is considered as a substituent on the ethyl chain.
- The full name will be "N,N-dimethyl" indicating that there are two methyl groups attached to the nitrogen, followed by "ethanamine" indicating that the longest carbon chain is ethane with an amine functional group.

### Final IUPAC Name
Putting it all together, the IUPAC name of the compound `(CH₃)₂N-C₂H₅` is **N,N-dimethylethanamine**.

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