The following structure is an anion with three possible resonance contributors. One incomplete resonance form is…
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Question “The following structure is an anion with three possible resonance contributors. One incomplete resonance form is…”
The following structure is an anion with three possible
resonance contributors. One incomplete resonance form is shown
below. Complete the given structure by adding nonbonding electrons
and formal charges. Draw the two remaining resonance structures (in
any order), including nonbonding electrons and formal charges.
Answer
Delocalize $math_tag_0 to draw the resonance structure for the given compound
The valence electron, bonding and nonbonding electrons on an atom can all be used to calculate the formal charge.
The delocalization $math_tag_0 can help to create resonance structure
Take a look at the following illustration to see the resonance structure created by the delocalization of the lone bond and the double bond. It is illustrated by curving arrows.
This formula can calculate the formal charge:
{\rm{Formal}}\,{\rm{charge}} = V - N - \frac{B}{2}V refers to valence electrons within a neutral atom. N indicates the number nonbonding electrons and B indicates the number bonding electrons found in an atom.
Draw the entire resonance form of the given structure. Add the formal charge to the drawing as shown below.
Below is how to calculate the formal charge of atoms.
\begin{array}{c}\\{\rm{Formal}}\,{\rm{charge}}\,{\rm{on O atom}} = 6 - 4 - \frac{4}{2}\\\\ = 0\\\end{array} \begin{array}{c}\\{\rm{Formal}}\,{\rm{charge}}\,{\rm{on S atom}} = 6 - 6 - \frac{2}{2}\\\\ = - 1\\\end{array} \begin{array}{c}\\{\rm{Formal}}\,{\rm{charge}}\,{\rm{on N atom}} = 5 - 0 - \frac{8}{2}\\\\ = 5 - 1\\\\ = + 1\\\end{array} \begin{array}{c}\\{\rm{Formal}}\,{\rm{charge}}\,{\rm{on carbon atom}} = 4 - 2 - \frac{6}{2}\\\\ = 4 - 5\\\\ = - 1\\\end{array}Accordingly, O’s formal charge is 0
Draw the resonance structure for the given compound using $math_tag_0 and delocalization of lone pairs
Ans:
The two remaining resonance structures for the compound are shown below.
Conclusion
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