Problem: In a trigonal-bipyramidal geometry, there are two types of positions for the outer atoms.What is the bond angle formed by an axial atom, the central atom, and any equatorial atom?

FREE Expert Solution

We’re being asked to determine the bond angle formed by an axial atom, the central atom, and any equatorial atom.

The trigonal bipyramidal geometry is a molecular geometry with one atom at the center and 5 more atoms at the corners of a triangular bipyramid. 


It has two distinct types of position for the other atoms

  • an axial position 
    • if we hold a model of a trigonal bipyramid by the two axial positions, we have an axis around which we can rotate the model
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Problem Details

A central atom is connected horizontally to three equatorial positions, forming an equilateral triangle, and two axial positions, perpendicularly above and below the equatorial positions.

In a trigonal-bipyramidal geometry, there are two types of positions for the outer atoms.

What is the bond angle formed by an axial atom, the central atom, and any equatorial atom?

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