The molecular geometry of the carbon atom in hydrogen cyanide (HCN) is linear. In HCN, the carbon atom is triple-bonded to the nitrogen atom and single-bonded to the hydrogen atom. This arrangement results in a linear shape because the triple bond between carbon and nitrogen creates a strong repulsion that keeps the atoms in a straight line.
Here’s a breakdown of the structure:
- Carbon (C): The central atom.
- Hydrogen (H): Single-bonded to the carbon atom.
- Nitrogen (N): Triple-bonded to the carbon atom.
The linear geometry is confirmed by the fact that the bond angle between the hydrogen, carbon, and nitrogen atoms is 180 degrees. This linear arrangement minimizes electron repulsion, making the molecule stable.