The Lewis structure, the shape and the polarity of dimethyl ether ( C H 3 O C H 3 ) has to be determined. Concept Introduction: Lewis structures are also known as Lewis dot structures which represent the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule. Covalent bonds are formed by sharing of electrons between atoms. The polarity of a bond is arises due to the difference in electronegativity of atoms present in that bonding. Molecular geometry can be predicted from the 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 a trigonal planar. 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.

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Chapter 4.10, Problem 4.21P

Interpretation Introduction

Interpretation:

The Lewis structure, the shape and the polarity of dimethyl ether (CH3OCH3) has to be determined.

Concept Introduction:

Lewis structures are also known as Lewis dot structures which represent the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

Covalent bonds are formed by sharing of electrons between atoms.

The polarity of a bond is arises due to the difference in electronegativity of atoms present in that bonding.

Molecular geometry can be predicted from the 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 a trigonal planar.

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.

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