Q2 / 100 · BITSAT 2024 (Memory Based Paper 1) · Chemistry

Ferrocene is:

  • Correct answer
    A
    $\mathrm{Fe}\left(\mathrm{n}^5-\mathrm{C}_5 \mathrm{H}_5\right)_2$
  • B
    $\mathrm{Fe}\left(\mathrm{n}^2-\mathrm{C}_5 \mathrm{H}_5\right)_2$
  • C
    $\mathrm{Cr}\left(\mathrm{n}^5-\mathrm{C}_5 \mathrm{H}_5\right)_5$
  • D
    $\mathrm{Os}\left(\mathrm{n}^5-\mathrm{C}_5 \mathrm{H}_5\right)_2$

Solution

Ferrocene has two cyclopentadienyl rings coordinated to an $\mathrm{Fe}^{2+}$ ion. The hapticity of each ring is 5 .

Hence, the correct answer is option: 'A'.

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