The geometry and bond angles of the given compounds are needed to be determined. Concept introduction: Molecular shape can be predicted from the Lewis structure by using the valence-shell Electron-pair repulsion (VSEPR) model. -Count the number of valence electron pairs (bond pairs and lone pairs). -Assume that the valence electron pairs form a structure that allows them to be as far away from each other as possible. -If there are only two bond pair electrons, the molecule is linear. -If there are three bond pair electrons, the molecule is shaped like an equilateral triangle. -If there are four bond pair electrons, the molecule is shaped as a regular tetrahedral. - Repulsion between lone pair-bond pair of electrons effect the geometry of molecules. Bond angle is the angle between two bonds of a molecule and it is determined based on the geometry. [Bond angles: l i n e a r = 180 o , e q u i l a t e r a l t r i a n g l e = 120 o ]

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Chapter 4, Problem 4.63AP

Interpretation Introduction

Interpretation:

The geometry and bond angles of the given compounds are needed to be determined.

Concept introduction:

Molecular shape can be predicted from the Lewis structure by using the valence-shell Electron-pair repulsion (VSEPR) model.

-Count the number of valence electron pairs (bond pairs and lone pairs).

-Assume that the valence electron pairs form a structure that allows them to be as far away from each other as possible.

-If there are only two bond pair electrons, the molecule is linear.

-If there are three bond pair electrons, the molecule is shaped like an equilateral triangle.

-If there are four bond pair electrons, the molecule is shaped as a regular tetrahedral.

- Repulsion between lone pair-bond pair of electrons effect the geometry of molecules.

Bond angle is the angle between two bonds of a molecule and it is determined based on the geometry.

[Bond angles: linear=180o, equilateral triangle=120o]

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