Chapter 4, Problem 4.87CP

Interpretation Introduction

Interpretation:

The structure formulas, the geometry around the carbon atoms and the polarity of two molecules having the molecular formula of $C_2{H}_{4}O$ has to be determined.

Concept introduction:

Structural formula: The representation of each atom with their symbol in a bond-line structure of a compound is called as structural formula.

The compounds having general formula $C_n{H}_{2n}$ will have a double bond.

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.

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