232331
Which of the following compounds are aromatic?
1 A, B
2 A, B, C
3 $\mathrm{B}, \mathrm{C}$
4 B, C, D
5 A, B, D
Explanation:
(A): The compound which follow Huckel's rule of aromaticity is called aromatic compound for Huckel's compound having $(4 n+2) \pi$ electron where $n=$ $0,1,2,3, \ldots$.
Kerala CEE-2018
GENERAL ORGANIC CHEMISTRY
232335
Which one of the following is aromatic?
1 Cycloheptatrienly cation
2 Cycloheptrarene
3 Cyclooctateraene
4 Cyclopentadienyl cation
Explanation:
(A): To check the aromaticity of compound it must be follow these rules. (i) Compound should be planar and cyclic. (ii) It must be follow Huckel's rule i.e. compound have $(4 n+2) \pi e^{-}$. where $\mathrm{n}$ is $0,1,2,3$.. It is aromatic compound because it has $(4 \pi+2) \pi$ electron i.e. it has $6 \pi \mathrm{e}^{-}$. It is non-aromatic because it is not a planer compound i.e. one carbon is $\mathrm{sp}^{3}$ hybridized. It is an aromatic compound because it has $4 \mathrm{n} \pi$ electron i.e. it contains $8 \pi \mathrm{e}^{-}$. It is also anti aromatic compound because it has $4 n \pi$ electron i.e. it contain $4 \pi$-electron.
Manipal 2016
GENERAL ORGANIC CHEMISTRY
232337
Which of the following compound is not aromatic?
1 1,3-cyclobutene
2 Pyridine
3 Furan
4 Thiophene
Explanation:
(A): The compound which does not exhibit condition of Huckel's rule is called non aromatic compound. The compound follow $(4 n+2) \pi$ electron system is called aromatic compound. It does not follow $(4 n+2) \pi e^{-}$it has $4 \pi$-electron. So, it anti-aromatic not aromatic. It is an aromatic compound because it has $6 \pi \mathrm{e}^{-}$and follow Huckel's rule. It is also an aromatic compound because due to presence of conc. pair of electron it has $6 \pi \mathrm{e}^{-}$and follow It is also an aromatic compound because it has $6 \pi$ electron. In these case one lone pair take part in conjugation.
MHT CET-2012
GENERAL ORGANIC CHEMISTRY
232342
Assertion: Tropylium cation is aromatic in nature. Reason: The only property that determines its aromatic behaviour is its planar structure.
1 If both Assertion and Reason are correct and the reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
(C): Tropylium cotion is an aromatic in nature because it has cyclic \& planer structure (it means all carbon atoms are $\mathrm{sp}^{2}$ hybridised) and it follows Huckle's rule of aromaticity. - It also have $(4 n+2) \pi$ electrons system which conform that it is aromatic. - It also have resonance system which is conjugated system (means it have alternate double bond the charge). From the above explanation. Assertion is correct but Reason incorrect.
AIIMS-2014
GENERAL ORGANIC CHEMISTRY
232344
The total number of aromatic species generated in the following reactions is
1 zero
2 2
3 3
4 4
Explanation:
The total number of aromatic species generated in the reaction is 3. After making the product the obtained product is follow Huckel's is $(4 n+2) \pi e^{-}$then it is said to be aromatic. It is anti-aromatic because it has $4 \pi$-electron which does not follow Huckel's rule. So, the total number of aromatic compound is 3 and one is anti-aromatic.
232331
Which of the following compounds are aromatic?
1 A, B
2 A, B, C
3 $\mathrm{B}, \mathrm{C}$
4 B, C, D
5 A, B, D
Explanation:
(A): The compound which follow Huckel's rule of aromaticity is called aromatic compound for Huckel's compound having $(4 n+2) \pi$ electron where $n=$ $0,1,2,3, \ldots$.
Kerala CEE-2018
GENERAL ORGANIC CHEMISTRY
232335
Which one of the following is aromatic?
1 Cycloheptatrienly cation
2 Cycloheptrarene
3 Cyclooctateraene
4 Cyclopentadienyl cation
Explanation:
(A): To check the aromaticity of compound it must be follow these rules. (i) Compound should be planar and cyclic. (ii) It must be follow Huckel's rule i.e. compound have $(4 n+2) \pi e^{-}$. where $\mathrm{n}$ is $0,1,2,3$.. It is aromatic compound because it has $(4 \pi+2) \pi$ electron i.e. it has $6 \pi \mathrm{e}^{-}$. It is non-aromatic because it is not a planer compound i.e. one carbon is $\mathrm{sp}^{3}$ hybridized. It is an aromatic compound because it has $4 \mathrm{n} \pi$ electron i.e. it contains $8 \pi \mathrm{e}^{-}$. It is also anti aromatic compound because it has $4 n \pi$ electron i.e. it contain $4 \pi$-electron.
Manipal 2016
GENERAL ORGANIC CHEMISTRY
232337
Which of the following compound is not aromatic?
1 1,3-cyclobutene
2 Pyridine
3 Furan
4 Thiophene
Explanation:
(A): The compound which does not exhibit condition of Huckel's rule is called non aromatic compound. The compound follow $(4 n+2) \pi$ electron system is called aromatic compound. It does not follow $(4 n+2) \pi e^{-}$it has $4 \pi$-electron. So, it anti-aromatic not aromatic. It is an aromatic compound because it has $6 \pi \mathrm{e}^{-}$and follow Huckel's rule. It is also an aromatic compound because due to presence of conc. pair of electron it has $6 \pi \mathrm{e}^{-}$and follow It is also an aromatic compound because it has $6 \pi$ electron. In these case one lone pair take part in conjugation.
MHT CET-2012
GENERAL ORGANIC CHEMISTRY
232342
Assertion: Tropylium cation is aromatic in nature. Reason: The only property that determines its aromatic behaviour is its planar structure.
1 If both Assertion and Reason are correct and the reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
(C): Tropylium cotion is an aromatic in nature because it has cyclic \& planer structure (it means all carbon atoms are $\mathrm{sp}^{2}$ hybridised) and it follows Huckle's rule of aromaticity. - It also have $(4 n+2) \pi$ electrons system which conform that it is aromatic. - It also have resonance system which is conjugated system (means it have alternate double bond the charge). From the above explanation. Assertion is correct but Reason incorrect.
AIIMS-2014
GENERAL ORGANIC CHEMISTRY
232344
The total number of aromatic species generated in the following reactions is
1 zero
2 2
3 3
4 4
Explanation:
The total number of aromatic species generated in the reaction is 3. After making the product the obtained product is follow Huckel's is $(4 n+2) \pi e^{-}$then it is said to be aromatic. It is anti-aromatic because it has $4 \pi$-electron which does not follow Huckel's rule. So, the total number of aromatic compound is 3 and one is anti-aromatic.
232331
Which of the following compounds are aromatic?
1 A, B
2 A, B, C
3 $\mathrm{B}, \mathrm{C}$
4 B, C, D
5 A, B, D
Explanation:
(A): The compound which follow Huckel's rule of aromaticity is called aromatic compound for Huckel's compound having $(4 n+2) \pi$ electron where $n=$ $0,1,2,3, \ldots$.
Kerala CEE-2018
GENERAL ORGANIC CHEMISTRY
232335
Which one of the following is aromatic?
1 Cycloheptatrienly cation
2 Cycloheptrarene
3 Cyclooctateraene
4 Cyclopentadienyl cation
Explanation:
(A): To check the aromaticity of compound it must be follow these rules. (i) Compound should be planar and cyclic. (ii) It must be follow Huckel's rule i.e. compound have $(4 n+2) \pi e^{-}$. where $\mathrm{n}$ is $0,1,2,3$.. It is aromatic compound because it has $(4 \pi+2) \pi$ electron i.e. it has $6 \pi \mathrm{e}^{-}$. It is non-aromatic because it is not a planer compound i.e. one carbon is $\mathrm{sp}^{3}$ hybridized. It is an aromatic compound because it has $4 \mathrm{n} \pi$ electron i.e. it contains $8 \pi \mathrm{e}^{-}$. It is also anti aromatic compound because it has $4 n \pi$ electron i.e. it contain $4 \pi$-electron.
Manipal 2016
GENERAL ORGANIC CHEMISTRY
232337
Which of the following compound is not aromatic?
1 1,3-cyclobutene
2 Pyridine
3 Furan
4 Thiophene
Explanation:
(A): The compound which does not exhibit condition of Huckel's rule is called non aromatic compound. The compound follow $(4 n+2) \pi$ electron system is called aromatic compound. It does not follow $(4 n+2) \pi e^{-}$it has $4 \pi$-electron. So, it anti-aromatic not aromatic. It is an aromatic compound because it has $6 \pi \mathrm{e}^{-}$and follow Huckel's rule. It is also an aromatic compound because due to presence of conc. pair of electron it has $6 \pi \mathrm{e}^{-}$and follow It is also an aromatic compound because it has $6 \pi$ electron. In these case one lone pair take part in conjugation.
MHT CET-2012
GENERAL ORGANIC CHEMISTRY
232342
Assertion: Tropylium cation is aromatic in nature. Reason: The only property that determines its aromatic behaviour is its planar structure.
1 If both Assertion and Reason are correct and the reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
(C): Tropylium cotion is an aromatic in nature because it has cyclic \& planer structure (it means all carbon atoms are $\mathrm{sp}^{2}$ hybridised) and it follows Huckle's rule of aromaticity. - It also have $(4 n+2) \pi$ electrons system which conform that it is aromatic. - It also have resonance system which is conjugated system (means it have alternate double bond the charge). From the above explanation. Assertion is correct but Reason incorrect.
AIIMS-2014
GENERAL ORGANIC CHEMISTRY
232344
The total number of aromatic species generated in the following reactions is
1 zero
2 2
3 3
4 4
Explanation:
The total number of aromatic species generated in the reaction is 3. After making the product the obtained product is follow Huckel's is $(4 n+2) \pi e^{-}$then it is said to be aromatic. It is anti-aromatic because it has $4 \pi$-electron which does not follow Huckel's rule. So, the total number of aromatic compound is 3 and one is anti-aromatic.
232331
Which of the following compounds are aromatic?
1 A, B
2 A, B, C
3 $\mathrm{B}, \mathrm{C}$
4 B, C, D
5 A, B, D
Explanation:
(A): The compound which follow Huckel's rule of aromaticity is called aromatic compound for Huckel's compound having $(4 n+2) \pi$ electron where $n=$ $0,1,2,3, \ldots$.
Kerala CEE-2018
GENERAL ORGANIC CHEMISTRY
232335
Which one of the following is aromatic?
1 Cycloheptatrienly cation
2 Cycloheptrarene
3 Cyclooctateraene
4 Cyclopentadienyl cation
Explanation:
(A): To check the aromaticity of compound it must be follow these rules. (i) Compound should be planar and cyclic. (ii) It must be follow Huckel's rule i.e. compound have $(4 n+2) \pi e^{-}$. where $\mathrm{n}$ is $0,1,2,3$.. It is aromatic compound because it has $(4 \pi+2) \pi$ electron i.e. it has $6 \pi \mathrm{e}^{-}$. It is non-aromatic because it is not a planer compound i.e. one carbon is $\mathrm{sp}^{3}$ hybridized. It is an aromatic compound because it has $4 \mathrm{n} \pi$ electron i.e. it contains $8 \pi \mathrm{e}^{-}$. It is also anti aromatic compound because it has $4 n \pi$ electron i.e. it contain $4 \pi$-electron.
Manipal 2016
GENERAL ORGANIC CHEMISTRY
232337
Which of the following compound is not aromatic?
1 1,3-cyclobutene
2 Pyridine
3 Furan
4 Thiophene
Explanation:
(A): The compound which does not exhibit condition of Huckel's rule is called non aromatic compound. The compound follow $(4 n+2) \pi$ electron system is called aromatic compound. It does not follow $(4 n+2) \pi e^{-}$it has $4 \pi$-electron. So, it anti-aromatic not aromatic. It is an aromatic compound because it has $6 \pi \mathrm{e}^{-}$and follow Huckel's rule. It is also an aromatic compound because due to presence of conc. pair of electron it has $6 \pi \mathrm{e}^{-}$and follow It is also an aromatic compound because it has $6 \pi$ electron. In these case one lone pair take part in conjugation.
MHT CET-2012
GENERAL ORGANIC CHEMISTRY
232342
Assertion: Tropylium cation is aromatic in nature. Reason: The only property that determines its aromatic behaviour is its planar structure.
1 If both Assertion and Reason are correct and the reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
(C): Tropylium cotion is an aromatic in nature because it has cyclic \& planer structure (it means all carbon atoms are $\mathrm{sp}^{2}$ hybridised) and it follows Huckle's rule of aromaticity. - It also have $(4 n+2) \pi$ electrons system which conform that it is aromatic. - It also have resonance system which is conjugated system (means it have alternate double bond the charge). From the above explanation. Assertion is correct but Reason incorrect.
AIIMS-2014
GENERAL ORGANIC CHEMISTRY
232344
The total number of aromatic species generated in the following reactions is
1 zero
2 2
3 3
4 4
Explanation:
The total number of aromatic species generated in the reaction is 3. After making the product the obtained product is follow Huckel's is $(4 n+2) \pi e^{-}$then it is said to be aromatic. It is anti-aromatic because it has $4 \pi$-electron which does not follow Huckel's rule. So, the total number of aromatic compound is 3 and one is anti-aromatic.
232331
Which of the following compounds are aromatic?
1 A, B
2 A, B, C
3 $\mathrm{B}, \mathrm{C}$
4 B, C, D
5 A, B, D
Explanation:
(A): The compound which follow Huckel's rule of aromaticity is called aromatic compound for Huckel's compound having $(4 n+2) \pi$ electron where $n=$ $0,1,2,3, \ldots$.
Kerala CEE-2018
GENERAL ORGANIC CHEMISTRY
232335
Which one of the following is aromatic?
1 Cycloheptatrienly cation
2 Cycloheptrarene
3 Cyclooctateraene
4 Cyclopentadienyl cation
Explanation:
(A): To check the aromaticity of compound it must be follow these rules. (i) Compound should be planar and cyclic. (ii) It must be follow Huckel's rule i.e. compound have $(4 n+2) \pi e^{-}$. where $\mathrm{n}$ is $0,1,2,3$.. It is aromatic compound because it has $(4 \pi+2) \pi$ electron i.e. it has $6 \pi \mathrm{e}^{-}$. It is non-aromatic because it is not a planer compound i.e. one carbon is $\mathrm{sp}^{3}$ hybridized. It is an aromatic compound because it has $4 \mathrm{n} \pi$ electron i.e. it contains $8 \pi \mathrm{e}^{-}$. It is also anti aromatic compound because it has $4 n \pi$ electron i.e. it contain $4 \pi$-electron.
Manipal 2016
GENERAL ORGANIC CHEMISTRY
232337
Which of the following compound is not aromatic?
1 1,3-cyclobutene
2 Pyridine
3 Furan
4 Thiophene
Explanation:
(A): The compound which does not exhibit condition of Huckel's rule is called non aromatic compound. The compound follow $(4 n+2) \pi$ electron system is called aromatic compound. It does not follow $(4 n+2) \pi e^{-}$it has $4 \pi$-electron. So, it anti-aromatic not aromatic. It is an aromatic compound because it has $6 \pi \mathrm{e}^{-}$and follow Huckel's rule. It is also an aromatic compound because due to presence of conc. pair of electron it has $6 \pi \mathrm{e}^{-}$and follow It is also an aromatic compound because it has $6 \pi$ electron. In these case one lone pair take part in conjugation.
MHT CET-2012
GENERAL ORGANIC CHEMISTRY
232342
Assertion: Tropylium cation is aromatic in nature. Reason: The only property that determines its aromatic behaviour is its planar structure.
1 If both Assertion and Reason are correct and the reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
(C): Tropylium cotion is an aromatic in nature because it has cyclic \& planer structure (it means all carbon atoms are $\mathrm{sp}^{2}$ hybridised) and it follows Huckle's rule of aromaticity. - It also have $(4 n+2) \pi$ electrons system which conform that it is aromatic. - It also have resonance system which is conjugated system (means it have alternate double bond the charge). From the above explanation. Assertion is correct but Reason incorrect.
AIIMS-2014
GENERAL ORGANIC CHEMISTRY
232344
The total number of aromatic species generated in the following reactions is
1 zero
2 2
3 3
4 4
Explanation:
The total number of aromatic species generated in the reaction is 3. After making the product the obtained product is follow Huckel's is $(4 n+2) \pi e^{-}$then it is said to be aromatic. It is anti-aromatic because it has $4 \pi$-electron which does not follow Huckel's rule. So, the total number of aromatic compound is 3 and one is anti-aromatic.
