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Polarity of Carbon tetrachloride(CCl4)

Dec 20,2023

Polarity of Carbon tetrachloride(CCl4)

CCl4 is an organic compound that can be formed by the halogenation of methane and chlorine in the presence of sunlight. Chlorine is arranged tetrahedrally around the carbon atoms, resulting in a symmetrical arrangement. The polarity of the bond is a result of the separation of some of the charges in the covalent bond due to differences in electronegativity.

Carbon tetrachloride

Chlorine is a halogen with a high effective nuclear charge, which leads to a high electronegativity, giving the carbon atom a slight positive charge. This difference in electronegativity between carbon and chlorine makes their bond polar. However, bond polarity by itself does not determine the properties of the entire compound. Since the four equidistant bonds are symmetrically arranged, the dipole moment in them points towards the more electronegative chlorine atom. When the magnitudes are the same and the directions are opposite, the dipole moments as vectors are cancelled out. The dipole moment of one bond cancels out the dipole moment of the other bond that is opposite to it. Thus, the two pairs of bonds in carbon tetrachloride cancel each other out, resulting in a net zero dipole moment.

Therefore carbon tetrachloride CCl4 is a nonpolar molecule.

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