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What is true about the 1,3,5,7-cyclooctatetraene?
- a)It is an aromatic compound
- b)It is an anti-aromatic compound
- c)It on reaction with K metal absorbs two electrons
- d)On refluxing with K metal, it gives off H2 gas
Correct answer is option 'B,C'. Can you explain this answer?
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Verified Answer
What is true about the 1,3,5,7-cyclooctatetraene?a)It is an aromatic c...
1-3-5-7-cyclooctatetraene it has 8 pi electrons, and like stated above, fits the criteria of 4n, to be antiaromatic. to avoid this state of anti-aromaticity (less stable then expected), it becomes non-planar, so it can be more stable then it would be in the antiaromatic state. cyclooctatetraene can do this because it can fold, however other 6 carbon compounds that have 4n electrons and are planar can not and result in an antiaromatic compound.
Potassium cyclooctatetraene is formed by the reaction of cyclooctatetraene with potassium metal:
2 K + C8H8 → K2C8H8
The reaction entails 2-electron reduction of the polyene and is accompanied by a color change from colorless to brown.
Potassium cyclooctatetraene is formed by the reaction of cyclooctatetraene with potassium metal:
2 K + C8H8 → K2C8H8
The reaction entails 2-electron reduction of the polyene and is accompanied by a color change from colorless to brown.
Most Upvoted Answer
What is true about the 1,3,5,7-cyclooctatetraene?a)It is an aromatic c...
1. Introduction:
The compound in question is 1,3,5,7-cyclooctatetraene. In order to determine the true statements about this compound, we need to analyze its structure and properties.
2. Structure:
1,3,5,7-cyclooctatetraene is a cyclic hydrocarbon with eight carbon atoms arranged in a ring. It contains alternating single and double bonds, resulting in a conjugated system of pi electrons.
3. Aromaticity:
a) Option a) states that 1,3,5,7-cyclooctatetraene is an aromatic compound. However, this statement is false. In order for a compound to be considered aromatic, it must meet certain criteria, such as having a completely conjugated ring of pi electrons and fulfilling the Huckel's rule (4n+2 pi electrons). 1,3,5,7-cyclooctatetraene does not fulfill these criteria as it has eight pi electrons, which does not satisfy the Huckel's rule.
4. Anti-Aromaticity:
b) Option b) states that 1,3,5,7-cyclooctatetraene is an anti-aromatic compound. This statement is true. Anti-aromatic compounds possess a completely conjugated ring of pi electrons but do not fulfill the Huckel's rule (4n+2 pi electrons). The presence of four pi electrons in 1,3,5,7-cyclooctatetraene makes it an anti-aromatic compound.
5. Reactivity with K metal:
c) Option c) states that 1,3,5,7-cyclooctatetraene, on reaction with K metal, absorbs two electrons. This statement is true. 1,3,5,7-cyclooctatetraene can act as a diene and undergoes a Diels-Alder reaction with K metal, which results in the addition of two electrons to the compound.
6. Refluxing with K metal:
d) Option d) states that 1,3,5,7-cyclooctatetraene, on refluxing with K metal, gives off H2 gas. This statement is false. Refluxing 1,3,5,7-cyclooctatetraene with K metal does not result in the production of H2 gas. The reaction with K metal involves the addition of two electrons to the compound rather than the release of H2 gas.
In conclusion, the true statements about 1,3,5,7-cyclooctatetraene are that it is an anti-aromatic compound (option b) and on reaction with K metal, it absorbs two electrons (option c).
The compound in question is 1,3,5,7-cyclooctatetraene. In order to determine the true statements about this compound, we need to analyze its structure and properties.
2. Structure:
1,3,5,7-cyclooctatetraene is a cyclic hydrocarbon with eight carbon atoms arranged in a ring. It contains alternating single and double bonds, resulting in a conjugated system of pi electrons.
3. Aromaticity:
a) Option a) states that 1,3,5,7-cyclooctatetraene is an aromatic compound. However, this statement is false. In order for a compound to be considered aromatic, it must meet certain criteria, such as having a completely conjugated ring of pi electrons and fulfilling the Huckel's rule (4n+2 pi electrons). 1,3,5,7-cyclooctatetraene does not fulfill these criteria as it has eight pi electrons, which does not satisfy the Huckel's rule.
4. Anti-Aromaticity:
b) Option b) states that 1,3,5,7-cyclooctatetraene is an anti-aromatic compound. This statement is true. Anti-aromatic compounds possess a completely conjugated ring of pi electrons but do not fulfill the Huckel's rule (4n+2 pi electrons). The presence of four pi electrons in 1,3,5,7-cyclooctatetraene makes it an anti-aromatic compound.
5. Reactivity with K metal:
c) Option c) states that 1,3,5,7-cyclooctatetraene, on reaction with K metal, absorbs two electrons. This statement is true. 1,3,5,7-cyclooctatetraene can act as a diene and undergoes a Diels-Alder reaction with K metal, which results in the addition of two electrons to the compound.
6. Refluxing with K metal:
d) Option d) states that 1,3,5,7-cyclooctatetraene, on refluxing with K metal, gives off H2 gas. This statement is false. Refluxing 1,3,5,7-cyclooctatetraene with K metal does not result in the production of H2 gas. The reaction with K metal involves the addition of two electrons to the compound rather than the release of H2 gas.
In conclusion, the true statements about 1,3,5,7-cyclooctatetraene are that it is an anti-aromatic compound (option b) and on reaction with K metal, it absorbs two electrons (option c).
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What is true about the 1,3,5,7-cyclooctatetraene?a)It is an aromatic compoundb)It is an anti-aromatic compoundc)It on reaction with K metal absorbs two electronsd)On refluxing with K metal, it gives off H2 gasCorrect answer is option 'B,C'. Can you explain this answer?
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What is true about the 1,3,5,7-cyclooctatetraene?a)It is an aromatic compoundb)It is an anti-aromatic compoundc)It on reaction with K metal absorbs two electronsd)On refluxing with K metal, it gives off H2 gasCorrect answer is option 'B,C'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about What is true about the 1,3,5,7-cyclooctatetraene?a)It is an aromatic compoundb)It is an anti-aromatic compoundc)It on reaction with K metal absorbs two electronsd)On refluxing with K metal, it gives off H2 gasCorrect answer is option 'B,C'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is true about the 1,3,5,7-cyclooctatetraene?a)It is an aromatic compoundb)It is an anti-aromatic compoundc)It on reaction with K metal absorbs two electronsd)On refluxing with K metal, it gives off H2 gasCorrect answer is option 'B,C'. Can you explain this answer?.
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