1. Tardigrade
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  3. Chemistry
  4. Which of the following molecules, in pure form, is/are unstable at room temperature?

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Q. Which of the following molecules, in pure form, is/are unstable at room temperature?

IIT JEEIIT JEE 2012Hydrocarbons

Solution:

According to Huckel rule, the compounds which have 4n (n = 0,1, 2, 3...) delocalised $\pi$-electrons in a close-loop are anti-aromatic and characteristically unstable. Compound B satisfy the criteria of anti-aromaticity as:

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