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In principle, what is true regarding benzene and 1, 3, 5-cyclohexatriene?
  • a)
    Theoretically they are the same molecules
  • b)
    Both have same lengths of all of their C — C bonds
  • c)
    Both have same enthalpy of hydrogenation
  • d)
    Cyclohexatriene has two different C — C bond lengths while benzene has only one type of C — C bond length whose value is between those of cyclohexatriene
Correct answer is option 'D'. Can you explain this answer?
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In principle, what is true regarding benzene and 1, 3, 5-cyclohexatrie...
The correct answer is Option D.
In 1,3,5-cyclohexatriene, there are three C = C having a bond length 134 pm and three C - C having a bond length 154 pm. In benzene, all the six C - C bonds have the same bond length 139 pm. 
 
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In principle, what is true regarding benzene and 1, 3, 5-cyclohexatrie...
Benzene is an alicyclic compound which means that they can form a ring of carbon atoms. The structure of benzene is not easy to deduce. Early scientists had many ideas as to what its structure could be. However, a German scientist, Kekule, realised that benzene has a ring shape. He also suggested that there were alternating double bonds between the carbon atoms.However, there was a problem. Benzene was much more stable than a an alkene. In a thermochemistry calculation based on a Kekule structure, the enthalpy change calculated would always be wrong. Considering its double bonds, benzene should behave like an alkene, reacting with bromine to form a colourless solution. Unlike alkenes, benzene undergoes substitution reactions instead of addition reactions. Benzene also has a planar structure. The structure which Kekule suggested shows that the bonds have different lengths due to the electron densities around the single and double bonds. It was known that a single bond is longer than a double bond.Hence, Kekule’s structure is not entirely correct. The solution to this is for the electron densities to be spread out evenly. Thus each carbon atom in Benzene has 1.5 of a bond.
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In principle, what is true regarding benzene and 1, 3, 5-cyclohexatrie...
Bonds
c)Benzene is more stable than 1, 3, 5-cyclohexatriene
d)Benzene has alternating single and double bonds while 1, 3, 5-cyclohexatriene has only double bonds
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In principle, what is true regarding benzene and 1, 3, 5-cyclohexatriene?a)Theoretically they are the same moleculesb)Both have same lengths of all of their C — C bondsc)Both have same enthalpy of hydrogenationd)Cyclohexatriene has two different C — C bond lengths while benzene has only one type of C — C bond length whose value is between those of cyclohexatrieneCorrect answer is option 'D'. Can you explain this answer?
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In principle, what is true regarding benzene and 1, 3, 5-cyclohexatriene?a)Theoretically they are the same moleculesb)Both have same lengths of all of their C — C bondsc)Both have same enthalpy of hydrogenationd)Cyclohexatriene has two different C — C bond lengths while benzene has only one type of C — C bond length whose value is between those of cyclohexatrieneCorrect answer is option 'D'. 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 In principle, what is true regarding benzene and 1, 3, 5-cyclohexatriene?a)Theoretically they are the same moleculesb)Both have same lengths of all of their C — C bondsc)Both have same enthalpy of hydrogenationd)Cyclohexatriene has two different C — C bond lengths while benzene has only one type of C — C bond length whose value is between those of cyclohexatrieneCorrect answer is option 'D'. 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 In principle, what is true regarding benzene and 1, 3, 5-cyclohexatriene?a)Theoretically they are the same moleculesb)Both have same lengths of all of their C — C bondsc)Both have same enthalpy of hydrogenationd)Cyclohexatriene has two different C — C bond lengths while benzene has only one type of C — C bond length whose value is between those of cyclohexatrieneCorrect answer is option 'D'. Can you explain this answer?.
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