3 (c) Predict the spin state (high- or low-spin) for each complex and calculate CFSE. Indicate your reasoning in each case. (i) [Fe(H2O)6]²+ (ii) [Ru(NH3)6]²+ (iii) [Fe(CN)6]4 (12) (d) Which of these complexes mentioned in question 3 (c) is expected to exhibit strong Jahn- Teller distortion. Motivate your answer.

Draw the crystal field diagram of [W(CO)6]. Determine the  (a) Electronic configuration in terms t2geg  (b) Number of unpaired electrons  (c) Ligand field stabilization energy in terms of ΔO or ΔT

The complex ion Fe(CN)6³ is paramagnetic with one unpaired electron. The complex ion Fe(SCN)6³ has five unpaired electrons. Draw the crystal field diagrams of two complex ions. Which compound absorbs light with the shorter wavelength? Where does SCN- lie in the spectrochemical series relative to CN-? (hint: stronger or weaker 4. (a) (b) (c) field)

Write the valence electron configuration for the cobalt ions in the complexes  [Co(H2O)6]2+ and draw labelled crystal field splitting diagram (relative to the spherical ion) and calculate the magnetic moment, µ(spin-only) of the cobalt ion in the complexes and as a free metal ion.