Choose all that appliable Choose the aromatic compounds among those shown.
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Question “Choose all that appliable Choose the aromatic compounds among those shown.”
Answer
Because of their special structural properties, such as the conjugation of electrons via double bonds in a planar-cyclic ring structure, aromatic compounds are a particular type of compound. Aromatic compounds are more stable. The Huckel rule can help you classify a compound as anti-aromatic or aromatic.
Below are specific rules for aromatic compounds:
* The organic compound must be “cyclic”.
* The organic compound must have a ‘planar’ structure.
* The organic compound must be delocalized -electrons.
* The organic compound must contain (4n+2)-electrons. Where n = 0, 1, 2 ….
Below are specific rules for aromatic compounds:
* The organic compound must be “cyclic”.
* The organic compound must have a ‘planar’ structure.
* The organic compound must be delocalized -electrons.
* The organic compound must contain 4n-electrons. Where n is 0, 1, 2, 3, ….
Below is the compound:
The following requirements must be met in order for the compound to be considered aromatic.
It should be planned.
* It should be periodic;
* It should be delocalized with -electrons.
* It must be able to obey the Huckel rule for 4n-electrons.
The number of -electrons is 2
Applying the Huckel rule
\begin{array}{c}\\{\rm{4n = 4}}\\\\{\rm{n = 1}}\\\end{array}The compound is therefore anti-aromatic.
Below is the compound:
The following rules must be met in order for the compound to be considered aromatic:
It should be planned.
* It should be periodic;
* It should be delocalized with -electrons.
* It must be able to obey the Huckel rule for 4n-electrons.
The number of -electrons is 4
Applying the Huckel rule
\begin{array}{c}\\{\rm{4n = 4}}\\\\{\rm{n = 1}}\\\end{array}The compound is therefore anti-aromatic.
Below is the compound:
The following rules must be met in order for the compound to be considered aromatic:
* It should be planned
* It should be cyclic
* It should be delocalized using -electrons
* It must be able to obey the Huckel rule for 4n-electrons.
The number of -electrons is 8
Applying the Huckel rule
\begin{array}{c}\\{\rm{4n = 8}}\\\\{\rm{4n = }}\frac{8}{4}\\\\{\rm{n = 2}}\\\end{array}The compound is therefore anti-aromatic.
Below is the compound:
The following rules must be met in order for the compound to be considered aromatic:
* It should be planned
* It should be cyclic
* It should be delocalized using -electrons
* It should be able to obey the Huckel rule of (4n+2)-electrons.
The number of -electrons is 2
Applying the Huckel rule
\begin{array}{c}\\{\rm{4n + 2 = 2}}\\\\{\rm{4n = 0}}\\\\{\rm{n = 0}}\\\end{array}The compound is therefore aromatic.
Below is the compound:
The following rules must be met in order for the compound to be considered aromatic:
* It should be planned
* It should be cyclic
* It should be delocalized using -electrons
* It should be able to obey the Huckel rule of (4n+2)-electrons.
6 is the number of -electrons
Applying the Huckel rule
\begin{array}{c}\\{\rm{4n + 2 = 6}}\\\\{\rm{4n = 6}} - 2\\\\{\rm{n = }}\frac{4}{4}\\\\\,{\rm{n}} = 1\\\end{array}The compound is therefore aromatic.
Below is the compound:
The following rules must be met in order for the compound to be considered aromatic:
* It should be planned
* It should be cyclic
* It should be delocalized using -electrons
* It should be able to obey the Huckel rule of (4n+2)-electrons.
The number of -electrons is 6
Applying the Huckel rule
\begin{array}{c}\\{\rm{4n + 2 = 6}}\\\\{\rm{4n = 6}} - {\rm{2}}\\\\{\rm{n = 1}}\\\end{array}The compound is therefore aromatic.
Below is the compound:
The following rules must be met in order for the compound to be considered aromatic:
* It should be planned
It should be cyclic
* It should be delocalized using -electrons
* It should be able to obey the Huckel rule of (4n+2)-electrons.
The number of -electrons is 6
Applying the Huckel rule
\begin{array}{c}\\{\rm{4n + 2 = 6}}\\\\{\rm{4n = 6}} - {\rm{2}}\\\\{\rm{n = 1}}\\\end{array}The compound is therefore aromatic.
Ans:
Below are the aromatic compounds:
Conclusion
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