Multiple choice

Carbon atoms of 1, 3-butadiene are numbered as shown below CH2=CH−CH=CH2 Which of the following statements regarding the above compound is incorrect? A. Carbon atoms 1 and 4 are sp2-hybridized. B. The single bond between C2 and C3 is of the same length as the carbon-carbon bond length in ethane. C. It is a conjugated diene.

  1. Only A

  2. Only B

  3. Only C

  4. Only B and C

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Due to resonance, C2-C3 bond has some double bond character,  and hence its bond length (1.46 Ǻ) is shorter than the C-C bond length in ethane (1.54 Ǻ).

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