Homework Answers
The concept used to solve this problem is based on Huckel’s 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’s rule is used in estimating the aromaticity of a planar ring molecule.
The Huckel’s 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.
The number of electrons in the molecule are:
Rearrange the equation for 
.
…… (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’s rule is not satisfied because n can never be in fraction.
Substitute 2 for in equation (1).
The value of for 
electrons is 
.
So, when the number of electrons is 2, then the Huckel’s rule is satisfied.
Substitute 6 for in equation (1).
The value of for 
electrons is 1.
So, when the number of electrons is 6, then the Huckel’s rule is satisfied.
Substitute 10 for in equation (1).
The value of for 
electrons is 2.
So, when the number of electrons is 10, then the Huckel’s rule is satisfied.
Substitute 14 for in equation (1).
The value of for 
electrons is 3.
So, when the number of electrons is 14, then the Huckel’s rule is satisfied.
Substitute 18 for in equation (1).
The value of for 
electrons is 4.
So, when the number of electrons is 18, then the Huckel’s rule is satisfied.
The number of electron that satisfy Hückel’s rule is 2.
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Huckel's rule is used to recognize aromatic compounds. From the list below. select the values that...
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.
5. Circle the compounds below that are aromatic. 5. Circle the compounds below that are aromatic....
5. Circle the compounds below that are aromatic.
5. Circle the compounds below that are aromatic. Aromatic compounds obey Huckel's rule: they have 4n+2 Tt-electrons (where n = any integer including zero) in a closed, contiguous Tt-system (see pg 760, 764-766). Remember delocalized lone pairs are part of the T-system whereas localized lone pairs are not (see pg 765-768). Empty p-orbitals can also be part of the it-system.
determine if aromatic, anti-aromatic or non-aromatic thank you kindly! on - aromatic aromatic aromaty to sam...
determine if aromatic, anti-aromatic or non-aromatic
thank you kindly!
on - aromatic aromatic aromaty to sam no non 8 TB-N.B HN -NH tricky! Chapter 18 Activity 2 - Watch video Chapter 18 Aromaticity: 12:22-27:33 The following are Huckel's criteria for AROMATICITY: A. Flat and cyclic B. Fully conjugated C. 2, 6, 10, 14, etc... pi electrons (Or odd number of pi bonds/lone pairs) The following are Huckel's criteria for ANTI-AROMATICITY: A. Flat and cyclic B. Fully conjugated C. 4, 8,...
4. Which of the two molecules below are aromatic, if either? List Huckel's rules of aromaticity...
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 comp...
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.
Question 2 (1 point) Select all TRUE statements about the molecule below: A) This molecule obeys...
Question 2 (1 point) Select all TRUE statements about the molecule below: A) This molecule obeys Huckel's Rule (4n+2 electrons) B) This molecule is anti-aromatic C) This molecule has a conjugated pi-system D) This molecule is aromatic Question 3 (1 point) ✓ Saved Select all TRUE statements about the molecule below: A) This molecule does not obey Huckel's Rule. B) This molecule obeys Huckel's Rule (4n+2 electrons)
Use the following list of compounds to answer the following questions Select the compound that is...
Use the following list of compounds to answer the following questions Select the compound that is best described as: (a) A neutral system, 4x electrons, anti-aromatic (b) A 6 electron aromatic system. (C) An aromatic system because n = 2 in Huckel's rule 4n+2 (d) A 6 electron conjugate non-aromatic system (e) An unconjugated hydrocarbon. (1) Not aromatic as it is drawn, but if removed, it would aromatic cation (6) Not aromatic as it is drawn, but it has a...
2. Which of the following pi electrons in a cyclic compound meet the criteria of Hückel's...
2. Which of the following pi electrons in a cyclic compound meet the criteria of Hückel's rule? a. 4N b. 6N C. 4N42 d. 6N+2 3. From the following compounds having 10 pi electrons that meet Huckel's rule, circle on the aromatic ring. ??
6. Circle the aromatic compounds from the list below. (5 points) 7. Rank the compounds below...
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...
Aromaticity Worksheet CHEM 2410 Fall 2019 Determine if the following compounds are aromatic, anti-aromatic or non-aromatic....
Aromaticity Worksheet CHEM 2410 Fall 2019 Determine if the following compounds are aromatic, anti-aromatic or non-aromatic. Give reasons for your answer. ***Assume all the cyclic compounds are planar (flat) for these problems. Summary Notes: Aromatic - 4n+2 pi electrons, complete cyclic conjugated pi system and planar (flat) Anti-aromatic - 4n pi electrons, cyclic conjugated pi system and planar(flat) Non-aromatic-breaks any of the above rules (all other compounds) Sp3 hybridized heteroatoms (O, S, N) are involved in the pi system Sp2...
5. Circle the compounds below that are aromatic.
5. Circle the compounds below that are aromatic. Aromatic compounds obey Huckel's rule: they have 4n+2 Tt-electrons (where n = any integer including zero) in a closed, contiguous Tt-system (see pg 760, 764-766). Remember delocalized lone pairs are part of the T-system whereas localized lone pairs are not (see pg 765-768). Empty p-orbitals can also be part of the it-system.
determine if aromatic, anti-aromatic or non-aromatic
thank you kindly!
on - aromatic aromatic aromaty to sam no non 8 TB-N.B HN -NH tricky! Chapter 18 Activity 2 - Watch video Chapter 18 Aromaticity: 12:22-27:33 The following are Huckel's criteria for AROMATICITY: A. Flat and cyclic B. Fully conjugated C. 2, 6, 10, 14, etc... pi electrons (Or odd number of pi bonds/lone pairs) The following are Huckel's criteria for ANTI-AROMATICITY: A. Flat and cyclic B. Fully conjugated C. 4, 8,...
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.
Question 2 (1 point) Select all TRUE statements about the molecule below: A) This molecule obeys Huckel's Rule (4n+2 electrons) B) This molecule is anti-aromatic C) This molecule has a conjugated pi-system D) This molecule is aromatic Question 3 (1 point) ✓ Saved Select all TRUE statements about the molecule below: A) This molecule does not obey Huckel's Rule. B) This molecule obeys Huckel's Rule (4n+2 electrons)
Use the following list of compounds to answer the following questions Select the compound that is best described as: (a) A neutral system, 4x electrons, anti-aromatic (b) A 6 electron aromatic system. (C) An aromatic system because n = 2 in Huckel's rule 4n+2 (d) A 6 electron conjugate non-aromatic system (e) An unconjugated hydrocarbon. (1) Not aromatic as it is drawn, but if removed, it would aromatic cation (6) Not aromatic as it is drawn, but it has a...
2. Which of the following pi electrons in a cyclic compound meet the criteria of Hückel's rule? a. 4N b. 6N C. 4N42 d. 6N+2 3. From the following compounds having 10 pi electrons that meet Huckel's rule, circle on the aromatic ring. ??
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...
Aromaticity Worksheet CHEM 2410 Fall 2019 Determine if the following compounds are aromatic, anti-aromatic or non-aromatic. Give reasons for your answer. ***Assume all the cyclic compounds are planar (flat) for these problems. Summary Notes: Aromatic - 4n+2 pi electrons, complete cyclic conjugated pi system and planar (flat) Anti-aromatic - 4n pi electrons, cyclic conjugated pi system and planar(flat) Non-aromatic-breaks any of the above rules (all other compounds) Sp3 hybridized heteroatoms (O, S, N) are involved in the pi system Sp2...
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