The nodal plane in the `pi`-bond of ethene is located in:

Options

A. the molecular plane
B. a plane parallel to the molecular plane
C. a plane perpendicular to the molecular plane which bisects the carbon-carbon `sigma` bond at right angle
D. a plane perpendicular to the molecular plane which contains the carbon-carbon bond

Answer

To determine the location of the nodal plane in the pi bond of ethene, we can follow these steps:

### Step 1: Understand the Structure of Ethene
Ethene (C₂H₄) is a simple alkene with a double bond between two carbon atoms. Each carbon atom is bonded to two hydrogen atoms. The molecular structure can be represented as:

```
H H
\ /
C=C
/ \
H H
```

### Step 2: Identify the Bonding in Ethene
Ethene contains a double bond (C=C), which consists of one sigma (σ) bond and one pi (π) bond. The sigma bond is formed by the head-on overlap of sp² hybridized orbitals from each carbon atom.

### Step 3: Understand the Formation of the Pi Bond
The pi bond is formed by the side-to-side overlap of the unhybridized p orbitals from each carbon atom. These p orbitals are oriented perpendicular to the plane of the molecule.

### Step 4: Define the Nodal Plane
A nodal plane is a region in a molecule where the probability of finding an electron is zero. In the case of the pi bond in ethene, the nodal plane is the plane where the p orbitals overlap.

### Step 5: Locate the Nodal Plane in Ethene
In ethene, the pi electrons are located in a plane that is perpendicular to the molecular plane (the plane that contains the carbon and hydrogen atoms). Therefore, the nodal plane of the pi bond is the molecular plane itself.

### Conclusion
The nodal plane in the pi bond of ethene is located in the molecular plane.

### Final Answer
The nodal plane in the pi bond of ethene is located in the molecular plane.

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