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Part A

How important is the following resonance structure to the overall structure of dinitrogen monoxide?
[tex]\[ : \ddot{ N }- N \equiv O : \][/tex]

Match the words in the left column to the appropriate blanks in the sentences on the right.

1. is the most
2. -2
3. 0
4. is not
5. +2
6. +1
7. is -1

In the given resonance structure, the terminal nitrogen atom has a formal charge of [tex]$\square$[/tex], the central nitrogen atom has a formal charge of [tex]$\square$[/tex], and the oxygen atom has a charge of [tex]$\square$[/tex].

Since the negative formal charge [tex]$\square$[/tex] located on the most electronegative atom, the resonance structure [tex]$\square$[/tex] important to the overall structure.



Answer :

GinnyAnswer
To determine the importance of the given resonance structure of dinitrogen monoxide (N₂O), we need to analyze the formal charges on the atoms involved and the placement of the negative formal charge.

1. Identify the formal charges:
- Terminal nitrogen atom: In this resonance structure, the terminal nitrogen atom (the nitrogen not bonded to oxygen) has a formal charge of [tex]\( -1 \)[/tex].
- Central nitrogen atom: The central nitrogen atom (the nitrogen bonded to both the terminal nitrogen and oxygen) has a formal charge of [tex]\( +1 \)[/tex].
- Oxygen atom: The oxygen atom in this structure has a formal charge of [tex]\( 0 \)[/tex].

2. Evaluate placement of the negative formal charge:
- The negative formal charge [tex]\( -1 \)[/tex] is located on the nitrogen atom, which is less electronegative compared to oxygen.

3. Determine the importance of the resonance structure:
- Resonance structures are more important when the negative formal charge is situated on the most electronegative atom (which would be oxygen in this case). Hence, since the negative formal charge is not on the most electronegative atom (oxygen), this resonance structure is considered less important.

Now, let’s fill in the blanks using these observations:

- In the given resonance structure, the terminal nitrogen atom has a formal charge of [tex]\( -1 \)[/tex], the central nitrogen atom has a formal charge of [tex]\( +1 \)[/tex], and the oxygen atom has a charge of [tex]\( 0 \)[/tex].
- Since the negative formal charge [tex]\( -1 \)[/tex] is not located on the most electronegative atom, the resonance structure is not important to the overall structure.

Thus, the filled-in sentences are:

- In the given resonance structure, the terminal nitrogen atom has a formal charge of [tex]\( -1 \)[/tex], the central nitrogen atom has a formal charge of [tex]\( +1 \)[/tex], and the oxygen atom has a charge of [tex]\( 0 \)[/tex].
- Since the negative formal charge [tex]\( -1 \)[/tex] is not located on the most electronegative atom, the resonance structure is not important to the overall structure.

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