Answered: The molecules CH2Cl2, CHC13 and CCI4…

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter7: Covalent Bonding

Section: Chapter Questions

Problem 76QAP: In each of the following molecules, a central atom is surrounded by a total of three atoms or...

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Question

3. The molecules CH2C12, CHC13 and CCI4 all have a tetrahedral shape. Determine which of the
molecules is polar and which is nonpolar. For those that are polar, make a drawing indicating
the areas of &+ and &– charge.\

Expert Solution

Step 1

To determine which of the molecules is polar and which is nonpolar.

Step 2

Chlorine is electronegative as compare to the carbon atom. Therefore, in a carbon chlorine bond, it pulls the electron density towards its self. Due to shift of the negatively charged electron towards the chlorine atom, the carbon gets partial positive charge and chlorine gets partial negative charge on it. It makes the bond polar.

Step 3

The structure of CH₂Cl₂ and CHCl₃ is shown below. The net dipole moment generated by a C-Cl bond is not cancelled by other C-Cl bonds. That is why, CH₂Cl₂ and CHCl₃ are polar molecules.

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