Lewis Electron - Dot Structure of the nitrite ion NO2-

Lewis Dot Structure of the nitrite ion NO₂^-

A simple procedure for writing Lewis Dot Structures was given in a previous post entitled “Lewis Structures and the Octet Rule”.

Several worked examples relevant to this procedure were given in previous posts please see the Sitemap - Table of Contents (Lewis Electron Dot Structures).

Let us consider the case of the Lewis Dot Structures of the nitrite ion  NO₂^-.

 

Step 1: Connect the atoms with single bonds. 

Fig. 1 : Connect the atoms of NO2- with single bonds.

 

Step 2:  Calculate the # of electrons in π bonds (multiple bonds) using  formula (1): 

Where n in this case is 3. Where V = (5 +6*2) – (-1) = 18 , V is the number of valence electrons of the ion.

Therefore, P = 6n + 2 – V = 6 * 3 + 2 – 18  = 2     So, there is 1 double bond.

 

Step 3 & 4: The dot resonance structures of the nitrite ion NO₂^-  are as follows:

Fig. 2 : Plausible Lewis Resonance Dot Structures of NO2-

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Key Terms

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