The moleculargeometry for each given species, using VSEPR, is to be determined. Concept introduction: The VSEPR theory is used to predict the geometry of the molecules using the number of electron pairs surrounding the central atom. There is a repulsive force acting between the electron pairs of the molecule, which leads to instability. Hence, the electron pairs around the central atom in a covalent molecule arrange themselves in a way to minimize this repulsion and become stable. If the molecule has two bonding electron pairs and three nonbonding electron pairs. This forms geometry of type AB 2 E 3 , which indicates linear geometry. If the molecule has four bonding electron pairs and zero nonbonding electron pairs. This forms the geometry of type AB 4 , which indicates tetrahedral geometry. If the molecule has five bonding electron pairs and zero nonbonding electron pairs. This forms the geometry of type AB 5 , which indicates trigonal bipyramidal geometry. If the molecule has four bonding electron pairs and one nonbonding electron pair, This forms the geometry of type AB 4 E , which indicates see-saw geometry.

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Chapter 24, Problem 81QP

Interpretation Introduction

Interpretation:

The moleculargeometry for each given species, using VSEPR, is to be determined.

Concept introduction:

The VSEPR theory is used to predict the geometry of the molecules using the number of electron pairs surrounding the central atom.

There is a repulsive force acting between the electron pairs of the molecule, which leads to instability. Hence, the electron pairs around the central atom in a covalent molecule arrange themselves in a way to minimize this repulsion and become stable.

If the molecule has two bonding electron pairs and three nonbonding electron pairs. This forms geometry of type AB2E3, which indicates linear geometry.

If the molecule has four bonding electron pairs and zero nonbonding electron pairs. This forms the geometry of type AB4, which indicates tetrahedral geometry.

If the molecule has five bonding electron pairs and zero nonbonding electron pairs. This forms the geometry of type AB5, which indicates trigonal bipyramidal geometry.

If the molecule has four bonding electron pairs and one nonbonding electron pair, This forms the geometry of type AB4E, which indicates see-saw geometry.

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