Consider an ion with the following structure : `[H_2C=C=NH_2]^+` For this ion , we can define two planes : one plane containing H-C-H group , the other plane containing H-C-H group , what is the relationship between these planes ?

Options

A. They are at `120 ^0`
B. They are perpendicular to each other
C. They are in the same plane
D. More information is required

Answer

To solve the problem regarding the relationship between the two planes in the ion structure `[H_2C=C=NH_2]^+`, we can follow these steps:

### Step 1: Identify the Structure
The ion has the structure `[H_2C=C=NH_2]^+`. This indicates that there are two carbon atoms (C) connected by a double bond, and one of the carbon atoms is connected to two hydrogen atoms (H) while the other carbon is connected to an amine group (NH2).

### Step 2: Define the Two Planes
We need to define the two planes mentioned in the question:
- **Plane 1**: This plane contains the H-C-H group, which is associated with the first carbon atom (C1) connected to two hydrogen atoms (H).
- **Plane 2**: This plane contains the H-NH2 group, which is associated with the nitrogen atom (N) bonded to the second carbon atom (C2).

### Step 3: Analyze the Geometry
The structure of the ion suggests a linear arrangement due to the presence of double bonds. The carbon atoms are in a straight line, and the groups attached to them (H and NH2) will be positioned in a way that maximizes their spatial separation.

### Step 4: Determine the Relationship Between the Planes
In similar structures, such as allene (C3H4), the planes containing the different groups are perpendicular to each other. In this case, the H-C-H plane and the H-NH2 plane will also be perpendicular to each other due to the linear arrangement of the carbon atoms and the orientation of the attached groups.

### Conclusion
Thus, the relationship between the two planes is that they are **perpendicular to each other**.

### Final Answer
The two planes are perpendicular to each other.

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