The correct IUPAC name of `C_(6)H_(5)-NC` is

Options

A. Phenyl carbylamine
B. Phenyl isonitrile
C. Phenyl isocyanide
D. None of these

Explanation

To determine the correct IUPAC name of the compound with the formula C₆H₅NC, we can follow these steps:

### Step 1: Identify the components of the compound
The molecular formula C₆H₅NC indicates that the compound consists of:
- A phenyl group (C₆H₅)
- An isocyanide group (NC)

### Step 2: Understand the structure
The phenyl group is a benzene ring (C₆H₅) that is attached to a nitrogen atom, which in turn is connected to a carbon atom that is part of the isocyanide functional group (NC). The structure can be represented as:
```
C₆H₅
|
N
|
C
```

### Step 3: Determine the functional group
The presence of the isocyanide group (NC) indicates that this compound is an isocyanide. Isocyanides are characterized by the presence of a carbon atom bonded to a nitrogen atom with a single bond, and the nitrogen is also bonded to another carbon atom.

### Step 4: Name the compound
In IUPAC nomenclature, the name of the compound is derived from the substituents and the functional groups present. Since we have a phenyl group attached to an isocyanide, the correct IUPAC name for C₆H₅NC is "phenyl isocyanide."

### Final Answer
The correct IUPAC name of C₆H₅NC is **phenyl isocyanide**.

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