Complete the electronic configurations of the species below. $\text{Co}\ \ [\text{Ar}]\ \ldots$ $\text{Co}^{2+}\ \ [\text{Ar}]\ \ldots$
In an isolated transition metal atom, all five $d$ orbitals have equal energy. When a transition metal ion forms a tetrahedral complex, the $d$ orbitals separate into two groups with different energies. Finish an orbital energy diagram to show this, stating how many orbitals are in each group.
Cobalt(II) makes a six-coordinate complex containing three water molecules and three chloride ions. Write the formula for this complex, showing the overall charge if appropriate.
Explain, using diagrams, how many isomers the complex in (i) has.
Platinum(II) makes a four-coordinate complex containing two ammonia molecules and two chloride ions. Write the formula for this complex, showing the overall charge if appropriate.
This complex has two isomers. Draw the structures of these isomers and name them.
One of the isomers in (ii) is used as an important anticancer drug. State which isomer it is and explain why it is effective.
Transition metal ions are often present as hexa-aqua complexes in aqueous solution, and the ligand exchange reactions are reversible. $[\text{Cu}(\text{H}_2\text{O})_6]^{2+} + 4\text{NH}_3 \rightleftharpoons [\text{Cu}(\text{NH}_3)_4(\text{H}_2\text{O})_2]^{2+} + 4\text{H}_2\text{O}$ Write an expression for $K_{\text{stab}}$ for this equilibrium and state its units.
The numerical value of $K_{\text{stab}}$ for this equilibrium at $298\ \text{K}$ is $1.20 \times 10^{13}$. Explain how this value is connected to the relative stabilities of the two complexes.
This complex has two isomers. Draw the structures of these isomers and name them.
One of the isomers in (ii) is an important anticancer drug. State which isomer it is and explain why it works.