How polar or non-polar is SO3?

A non-polar molecule is SO3. Three S-O bonds and no non-bonding electron pairs are present in the molecule. Trigonal planar geometry produces a non-polar molecule.

A difference in electronegativity leads to polarity. Because it is more electronegative than sulphur, oxygen more strongly draws electrons. The oxygen in the S-O bond has an unequal distribution of electrons, which gives it a negative charge and gives the bond polarity.

The three S-O bonds are situated 120 degrees apart from one another in the same plane. The polarities are cancelled as a result of the trigonal planar geometry, and a non-polar molecule is created.

Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.


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