Huckel's rule is used to recognize aromatic compounds. From the list below, select the values that satisfy Huckel's rule.
Huckel's rule is used to recognize aromatic compounds. From the list below, select the values that satisfy Huckel's rule.
Homework Answers
General guidance
The concept used to solve this problem is based on Huckel\u2019s rule.
Aromatic compounds are made up of cyclic, planar molecules with a ring of resonance bonds. These molecules exhibit more stability than other arrangements with the same set of atoms. In organic chemistry, Huckel\u2019s rule is used in estimating the aromaticity of a planar ring molecule.
The Huckel\u2019s rule is followed when the cyclic molecule has 
electrons. The number of 
electrons in the molecule 
are calculated as:
Here, 
can be zero or any positive integer.
Step-by-step
Step 1 of 6
The number of 
electrons in the molecule 
are:
Rearrange the equation for 
.
\u2026\u2026 (1)
Substitute 4 for 
in equation (1).
The value of 
for 
electrons is 
.
Substitute 5 for 
in equation (1).
The value of 
for 
electrons is 
.
Substitute 8 for 
in equation (1).
The value of 
for 
electrons is 
.
Substitute 9 for 
in equation (1).
The value of 
for 
electrons is 
.
Substitute 12 for 
in equation (1).
The value of 
for 
electrons is 
.
Substitute 15 for 
in equation (1).
The value of 
for 
electrons is 
.
Substitute 16 for 
in equation (1).
The value of 
for 
electrons is 
.
Substitute 20 for 
in equation (1).
The value of 
for 
electrons is 
.
So, when the number of 
electrons are 4, 5, 8, 9, 12, 15, 16 and 20, then the Huckel\u2019s rule is not satisfied because n can never be in fraction.
For number of 
electrons equals to 4, 5, 8, 9, 12, 15, 16 and 20, the value of n is 
, 
, 
, 
, 
, 
, 
and 
respectively. However, 
can never be a fraction. Therefore, for above number of 
electrons, Huckel\u2019s rule is not satisfied.
Step 2 of 6
Substitute 2 for 
in equation (1).
The value of 
for 
electrons is 
.
So, when the number of 
electrons is 2, then the Huckel\u2019s rule is satisfied.
The number of 
electron that satisfy H\u00fcckel\u2019s rule is 2.
Equate 
with 2 to calculate the value of 
. The computed value of 
is 
. The value of 
can be zero. Therefore, when the number of 
electrons are 2, then the Huckel\u2019s rule is satisfied.
Step 3 of 6
Substitute 6 for 
in equation (1).
The value of 
for 
electrons is 1.
So, when the number of 
electrons is 6, then the Huckel\u2019s rule is satisfied.
The number of 
electrons that satisfy Huckel\u2019s rule is 6.
Equate 
with 6 to calculate the value of 
. The computed value of 
is 1. Here, 
is a positive integer. Therefore, when the number of 
electrons is 6, then the Huckel\u2019s rule is satisfied.
Step 4 of 6
Substitute 10 for 
in equation (1).
The value of 
for 
electrons is 2.
So, when the number of 
electrons is 10, then the Huckel\u2019s rule is satisfied.
The number of 
electrons that satisfy Huckel\u2019s rule is 10.
Equate 
with 10 to calculate the value of 
. The computed value of 
is 2. Here, 
is a positive integer. Therefore, when the number of 
electrons is 10, then the Huckel\u2019s rule is satisfied.
Step 5 of 6
Substitute 14 for 
in equation (1).
The value of 
for 
electrons is 3.
So, when the number of 
electrons is 14, then the Huckel\u2019s rule is satisfied.
The number of 
electrons that satisfy Huckel\u2019s rule is 14.
Equate 
with 14 to calculate the value of 
. The computed value of 
is 3. Here, 
is a positive integer. Therefore, when the number of 
electrons is 14, then the Huckel\u2019s rule is satisfied.
Step 6 of 6
Substitute 18 for 
in equation (1).
The value of 
for 
electrons is 4.
So, when the number of 
electrons is 18, then the Huckel\u2019s rule is satisfied.
The number of 
electrons that satisfy Huckel\u2019s rule is 18.
Equate 
with 18 to calculate the value of 
. The computed value of 
is 4. Here, 
is a positive integer. Therefore, when the number of 
electrons is 14, then the Huckel\u2019s rule is satisfied.
Answer
The number of 
electron that satisfy H\u00fcckel\u2019s rule is 2.
The number of 
electrons that satisfy Huckel\u2019s rule is 6.
The number of 
electrons that satisfy Huckel\u2019s rule is 10.
The number of 
electrons that satisfy Huckel\u2019s rule is 14.
The number of 
electrons that satisfy Huckel\u2019s rule is 18.
Answer only
The number of 
electron that satisfy H\u00fcckel\u2019s rule is 2.
The number of 
electrons that satisfy Huckel\u2019s rule is 6.
The number of 
electrons that satisfy Huckel\u2019s rule is 10.
The number of 
electrons that satisfy Huckel\u2019s rule is 14.
The number of 
electrons that satisfy Huckel\u2019s rule is 18.
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Huckel's rule is used to recognize aromatic compounds. From the list below, select the values that satisfy Huckel's rule.
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Huckel's rule is used to recognize aromatic compounds. From the list below. select the values that satisfy Huckel's rule. Number of pi electrons:
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Provide the missing reagents and aromatic compounds in the reaction scheme below. See below (or the...
Provide the missing reagents and aromatic compounds in the
reaction scheme below. See below (or the Hint) for the reagent
list; enter a reagent\'s letter into the appropriate box. A reagent
may be used more than once. Show formal charges, if applicable.
Note: this question provides no targeted feedback.
Provide the missing reagents and aromatic compounds in the reaction scheme below. See below (or the...
Provide the missing reagents and aromatic compounds in the
reaction scheme below. See below (or the Hint) for the reagent
list; enter a reagent\'s letter into the appropriate box. A reagent
may be used more than once. Show formal charges, if applicable.
Note: this question provides no targeted feedback.
Select the eight compounds below that are expected to exhibit aromatic stabilization. Note that lone pairs...
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4. Which of the two molecules below are aromatic, if either? List Huckel's rules of aromaticity and apply them to the compounds, briefly discussing if either of the molecules fail any of these rules.
Which of the two molecules below are aromatic, if either? List Huckel's rules of aromaticity and apply them to the compounds, briefly discussing if either of the molecules fail any of these rules.
5. Circle the compounds below that are aromatic.
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6. Circle the aromatic compounds from the list below. (5
points)
7. Rank the compounds below in order of reactivity to
Electrophilic Aromatic Substitution. Rank the most reactive
compound as compound 1 and the least reactive compound as compound
5. (5 points)
6. Circle the aromatic compounds from the list below. (5 points) OH :O: H 7. Rank the compounds below in order of reactivity to Electrophilic Aromatic Substitution. Rank the most reactive compound as compound 1 and the least...
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reaction scheme below. See below (or the Hint) for the reagent
list; enter a reagent\'s letter into the appropriate box. A reagent
may be used more than once. Show formal charges, if applicable.
Note: this question provides no targeted feedback.
Provide the missing reagents and aromatic compounds in the
reaction scheme below. See below (or the Hint) for the reagent
list; enter a reagent\'s letter into the appropriate box. A reagent
may be used more than once. Show formal charges, if applicable.
Note: this question provides no targeted feedback.
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