Assignment

1. Rank these coordinate complexes from highest to lowest Δo: Rh(CN)₆³⁻, Rh(NH₃)₅³⁺, RhCl₆³⁻

   1. Rh(CN)₆³⁻ > Rh(NH₃)₅³⁺ > RhCl₆³⁻
   2. Rh(NH₃)₅³⁺ > RhCl₆³⁻ > Rh(CN)₆³⁻
   3. RhCl₆³⁻ > Rh(CN)₆³⁻ > Rh(NH₃)₅³⁺
   4. Rh(CN)₆³⁻ > RhCl₆³⁻ > Rh(NH₃)₅³⁺

2. The correct order of ligands in the spectrochemical series is:

   1. CN⁻ > OH⁻ > F⁻ > Cl⁻
   2. OH⁻ > F⁻ > Cl⁻ > CN⁻
   3. CN⁻ > Cl⁻ > OH⁻ > F⁻
   4. F⁻ > Cl⁻ > OH⁻ > CN⁻

3. In octahedral complex ions, the t_2g orbitals are:

   1. d_xy, d_x²−y²
   2. d_x²−y², d_z²
   3. d_xy, d_xz, d_yz
   4. d_xz, d_yz, d_z²

4. CFSE for a high-spin system is zero. Its electronic distribution is:

   1. t_2g⁴ e_g⁰
   2. t_2g⁶ e_g³
   3. t_2g⁴ e_g²
   4. t_2g³ e_g²

5. The CN⁻ ion is a strong field ligand whereas Cl⁻ is usually a weak field ligand. Which of the following octahedral complexes has no unpaired electrons?

   1. Ni(Cl)₆⁴⁻
   2. Fe(CN)₆⁴⁻
   3. FeF₆⁴⁻
   4. CuCl₆⁴⁻