Equatorial position

Definition

An equatorial position in a molecular structure is one of the positions located around the central axis of a molecule, typically found in molecules with trigonal bipyramidal geometry. These positions are more spaced out compared to axial positions and generally experience less steric hindrance.

5 Must Know Facts For Your Next Test

1. Equatorial positions are found in molecules with trigonal bipyramidal geometry.
2. There are three equatorial positions in such molecules, lying in the same plane.
3. Equatorial bond angles are typically 120 degrees apart.
4. Substituents in equatorial positions usually experience less steric hindrance than those in axial positions.
5. Larger substituents prefer equatorial positions to minimize repulsion.

Review Questions

Related terms

Axial Position: An axial position is one of the two positions aligned along the vertical axis of a molecule with trigonal bipyramidal geometry.

Trigonal Bipyramidal Geometry: A type of molecular shape where five atoms or groups of atoms surround a central atom, forming two triangular bases joined at a common vertex.

Steric Hindrance:

The repulsion that occurs when atoms or groups of atoms are too close to each other, leading to higher energy and instability.