The complexes [V(H2O)6]3+ and [VF6]3- are both known.(a) Draw the d-orbital energy-level diagram for V(III) octahedralcomplexes. (b) What gives rise to the colors of thesecomplexes? (c) Which of the two complexes would youexpect to absorb light of higher energy?

a) Consider the following two cobalt complexes: [Co(H2O)2(OH)4] Complex A [Co(CO)6] 3+ Complex B (i) Draw the d-electron configuration for A and B. Label each set of orbitals. (ii) Explain how the d-electron configuration changes when cobalt is replaced by iridium in A and B. (iii) Calculate the CFSE for A and B. Show all calculations and units. (iv) Which of these two complexes (A or B) will interact with a magnet? Motivate your answer.

7. Which of the following complexes would most likely exhibit square planar geometry? Which would most likely exhibit tetrahedral geometry? (a) [Pt(PF:)4] (b) [Au(CN)4] (c) [Hg(CN)4]? (d) [ZrCl4] (e) [Ni(CN)4]+- (f) [Pt(CN)4]*- (5) (g) [IrCI(CO)(P(CH:);)»]

In the following list, identify a transition metal cation that cannot be used to distinguish between strong-field and weak-field ligands in octahedral complexes?           (A) Cr3+          (B) Fe3+          (C) Co3+          (D) None of them (any of them can be used)