The shape of carbanion is

Options

A. Linear
B. Planar
C. Pyramidal
D. None of these

Explanation

To determine the shape of a carbanion, we need to analyze its structure and hybridization. Here’s a step-by-step solution:

### Step 1: Identify the structure of the carbanion
A carbanion is a negatively charged carbon atom that has an extra pair of electrons. For example, in the case of a simple carbanion like methyl anion (CH₃⁻), the carbon atom is bonded to three hydrogen atoms and has one lone pair of electrons.

### Step 2: Count the bonds and lone pairs
In the carbanion, we have:
- 3 sigma bonds (C-H bonds)
- 1 lone pair of electrons

### Step 3: Determine the hybridization
The carbon atom in the carbanion is bonded to three hydrogen atoms and has one lone pair. This setup indicates that the carbon is using sp³ hybridization because it has four regions of electron density (3 bonds + 1 lone pair).

### Step 4: Determine the shape based on hybridization
With sp³ hybridization, the electron geometry around the carbon atom is tetrahedral. However, because one of the positions is occupied by a lone pair, the molecular geometry is altered. The presence of the lone pair pushes the hydrogen atoms closer together, resulting in a pyramidal shape (specifically, a trigonal pyramidal shape).

### Step 5: Conclusion
Thus, the shape of the carbanion is pyramidal.

### Final Answer
The shape of the carbanion is pyramidal.

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