The crystal structure of [Cu(H2O)6]2+ displays axial bond lengths of 238 pm and equatorial bond lengths of 195 pm. Using a crystal field splitting diagram, explain the reason for the difference in bond lengths in this complex.

[CoF6]3- absorbs 700 nm (red) radiation whereas [Co(H2O)6]3+ absorbs 600 nm (orange)radiation.Draw the crystal field splitting of the above two complexes. Clearly label the orbitals andshow the electron occupation.What are the colors (appearance) of the complexes?[CoF6]3-: [Co(H2O)6]3+ :

For each of the following pairs of complexes, identify the one that has the larger Crystal Field Stabilization Energy. A) [Fe(CN)6]3- B) [Ru(CN)6]3-

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.

Answer the following questions about the transition metals complexes with the chemical formulas [Co(en)3]3+and [CoCl6]3- Would either the low-spin or high-spin configuration result in a paramagnetic complex? One of the complexes is orange while the other is blue. Which cobalt complex is which color? Justify your answer and identify which color the complex will absorb based on its color.

Which of these complex ions is expected to be diamagnetic?           (B) [Co(CN)6]3–          (A) [CoCl6] 3–          (C) [CoF6]3–          (D) All the above

Crystal field energy diagram for [Mn(CN)6]-3

Which of the following complexes can have fac and mer isomers? [Co(NH3)6]3+ [Co(NH3)4Cl2]+ [Co(NH3)3Cl3] [Co(NH3)2Cl4]-

In 2001, chemists at SUNY-Stony Brook succeeded in syn-thesizing the complex trans-[Fe(CN)4(CO)2]2-, which could be a model of complexes that may have played a role in the origin of life. Sketch the structure of the complex.