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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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