Resonance structures space a set of 2 or much more Lewis structures that collectively describe the digital bonding a single polyatomic species including fountain bonds and fractional charges. Resonance frameworks are qualified of explicate delocalized electrons that cannot be expressed by a single Lewis formula with an integer variety of covalent bonds.




You are watching: Lewis dot structure for carbonate ion

Sometimes one Lewis framework is not Enough

Sometimes, also when official charges space considered, the bonding in some molecules or ions cannot be explained by a solitary Lewis structure. Resonance is a method of relenten delocalized electron within details molecules or polyatomic ions where the bonding can not be to express by a single Lewis formula. A molecule or ion through such delocalized electron is stood for by numerous contributing frameworks (also dubbed resonance structures or canonical forms). Together is the case for ozone ((ceO3)), an allotrope of oxygen through a V-shaped structure and an O–O–O edge of 117.5°.


Ozone ((O_3))

1. We know that ozone has a V-shaped structure, for this reason one O atom is central:


*

*
api/deki/files/39129/0dba2719a1c946313e50598da82f3343.jpg?revision=1" />
*
api/deki/files/39131/db9cf47bed755c41dd8c100bc67b7c41.jpg?revision=1&size=bestfit&width=703&height=89" />
*
api/deki/files/41698/62631ab04cf387e8f3a8baccfe446f9a.jpg?revision=1&size=bestfit&width=574&height=86" />
*


The Nitrate ((NO_3^-)) ion

1. Counting up the valence electrons: (1*5) + (3*6) + 1(ion) = 24 electrons

2. Draw the bond connectivities:

*

4. Place any kind of leftover electrons (24-24 = 0) on the facility atom:

*

6. Does the main atom have actually an octet?

YES space there possible resonance structures? YES

*



See more: What Kind Of Fish Is Flounder In The Little Mermaid ? Does Flounder Talk In The Little Mermaid

*