Q18 / 90 · KVPY 2014 (SB/SX) · Chemistry

The energies of $\mathrm{d}_{x y}$ and $D_{z}^{2}$ orbitals in octahedral and tetrahedral transition metal complexes are such that

  • A
    $E\left(d_{x y}\right)>E\left(d_{z}^{2 xy}\right)$ in both tetrahedral and octahedral complexes
  • B
    $E\left(d_{x y}^{x y}\right) < E\left(d_{z}^{2}\right)$ in both tetrahedral and octahedral complexes
  • Correct answer
    C
    $E\left(d_{x y}^{x y}\right)>E\left(d_{z}^{2}\right)$ in tetrahedral abut $E\left(d_{x y}\right) < E\left(d_{z}^{2}\right)$ in octahedral complexes
  • D
    $E\left(d_{x y}^{x y}\right) < E\left(d_{z}^{z}\right)$ in tetrahedral abut $E\left(d_{x y}^{x y}\right) < E\left(d_{z}^{2}\right)$ in octahedral complexes

Solution

Energy of $\mathrm{t}_{2} \mathrm{~g}$ orbitals $ < $ eg orbitals in octahedral complexes

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

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