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Home > physical & Theoretical Chemistry > physics & Theoretical Chemistry - Lewis frameworks - concept & examples > Lewis Structures and the Octet preeminence > Covalent Lewis structure of SO2 > Lewis frameworks of Sulfur Trioxide SO3 > Lewis Dot framework of the sulfite ion SO3-2

A simple technique for creating Lewis Structures is given in a previous post entitled “Lewis Structures and also the Octet Rule”.

several worked instances relevant to this procedure were offered in previous short articles please view the Sitemap - Table of components (Lewis Electron period Structures).

Let us think about the case of the sulfite ion. The chemical formula is SO3-2 .

What is the SO3-2 Lewis structure?


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Where n in this case is 4 since SO3-2 consists of 4 atoms.

where V = (6 + 6 + 6 + 6 ) – (-2) = 26 , V is the variety of valence electrons of the ion.

Therefore, p = 6n + 2 – V = 6 * 4 + 2 – 26  = 0   There room no  π electron in SO3-2

Therefore, the structure in step 1 is a plausible Lewis structure of SO3-2.

Electrons room placed roughly each atom so the the octet dominance is obeyed. Since S is a third row element can accommodate an ext than 8 valence electrons.

See more: Which Level Of Classification Contains Orders But Is Smaller Than Phylum?


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Resonance Structures #1-#3 are more stable as result of less charge separation - even though the S atom has an ext than 8 electron (expanded octet) - compare to structure #4. Framework #4 is less stable because of larger charge separation.


Lewis Structures|Octet Rule: A Simple method to write Lewis Structures

Simple Procedure for composing Lewis frameworks – Lewis frameworks for sulfur trioxide (SO3)

Dot framework |How do I draw a Lewis structure for a molecule - Lewis framework of Cyanamide


G.N. Lewis, J.A.C.S, 38, 762-785, (1916)  E. C. McGoran, J. Chem. Educ., 68, 19-23 (1991) A.B.P. Lever, J. Chem. Educ., 49, 819-821, (1972)
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