   # The molecule pictured below is epinephrine, a compound used as a bronchodilator and antiglaucoma agent. (a) Give a value for each of the indicated bond angles. (b) What are the most polar bonds in the molecule? ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 8, Problem 88GQ
Textbook Problem
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## The molecule pictured below is epinephrine, a compound used as a bronchodilator and antiglaucoma agent. (a) Give a value for each of the indicated bond angles. (b) What are the most polar bonds in the molecule?

(a)

Interpretation Introduction

Interpretation: The bond angle in the given compound should be determined.

Concept Introduction:

In VSEPR, the geometry of the molecule is explained based on minimizing electrostatic repulsion between the molecules’ valence electrons around a central atom

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

[Bond angles: tetrahedral = 109.5o, trigonal planar = 120o, T-shape = 90o]

Electron geometry is the shape of a molecule predicted by considering both bond electron pairs and lone pair of electrons.

Molecular geometry is the shape of a molecule predicted by considering only bond pair of electrons.

Bond angle: It is defined as the angle between the orbital contacting bonding electron pair around the central atom in a molecule ion. Bond angle is expressed in degree.

### Explanation of Solution

The compound is given below:

In bond angle 1, the geometry of central oxygen atom is bent due to the presence of two electron pairs on it. Hence, the bond angle of COH is 109.5o.

In bond angle 2 and 3, the geometry of central carbon atom is trigonal planar to minimize the electrostatic repulsion between the atoms. Hence, the bond angle of HCC and C=CC is 120o

(b)

Interpretation Introduction

Interpretation: The most polar bonds in the given compound should be determined.

Concept Introduction:

Polarity: It is a well separation of electric charge leading to a molecule or chemical compounds having an electrical dipole moment. Generally the polar molecules must contain polar bonds due to a different in electronegative between the bonded atoms.

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