Which amongst the following are organometalic componds :-
`(i) Al_(2)(CH_(3))_(6) (ii) K[PtCl_(3)(C_(2)H_(2))] (iii) N(CH_(3))_(3)`

Options

A. i only
B. iii only
C. i, ii, and iii
D. i and ii only

Answer

To determine which of the given compounds are organometallic compounds, we need to identify if there is a metal-carbon bond present in each compound. Organometallic compounds are defined as compounds that contain at least one bond between a metal and a carbon atom.

Let's analyze each compound step by step:

### Step 1: Analyze Compound (i) Al₂(CH₃)₆
- **Structure**: This compound consists of aluminum (Al) and methyl groups (CH₃).
- **Metal-Carbon Bond**: In this compound, aluminum is bonded to the carbon atoms of the methyl groups.
- **Conclusion**: Since there is a bond between aluminum (a metal) and carbon, Al₂(CH₃)₆ is an organometallic compound.

### Step 2: Analyze Compound (ii) K[PtCl₃(C₂H₂)]
- **Structure**: This compound contains potassium (K), platinum (Pt), chlorine (Cl), and ethylene (C₂H₂).
- **Metal-Carbon Bond**: In this compound, platinum is bonded to the carbon atoms of the ethylene group (C₂H₂).
- **Conclusion**: Since there is a bond between platinum (a metal) and carbon, K[PtCl₃(C₂H₂)] is also an organometallic compound.

### Step 3: Analyze Compound (iii) N(CH₃)₃
- **Structure**: This compound consists of nitrogen (N) and three methyl groups (CH₃).
- **Metal-Carbon Bond**: In this compound, nitrogen is bonded to the carbon atoms of the methyl groups.
- **Conclusion**: However, nitrogen is not a metal; it is a non-metal. Therefore, there is no metal-carbon bond present in N(CH₃)₃.
- **Final Conclusion**: N(CH₃)₃ is not an organometallic compound.

### Final Answer:
The organometallic compounds from the given options are:
- (i) Al₂(CH₃)₆
- (ii) K[PtCl₃(C₂H₂)]

Thus, the correct answer is **1 and 2 only**.

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