What is the spectrochemical series and its importance?

What would you expect the crystal field stabilisation energy to be and what value of magnetic moment would you expect for the following complexes?

(a) ${\left[{\mathrm{CoF}}_6\right]}^{3-}$

(b) ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$ 

(c) ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$ 

(d) ${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{4-}$

(e) ${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{3-}$

In the crystal structure of ${\mathrm{CuF}}_2$, the ${\mathrm{Cu}}^{2+}$ is six-coordinate with four ${\mathrm{F}}^{-}$ at a distance of $1.93 \stackrel{°}{\mathrm{A}}$ and two ${\mathrm{F}}^{-}$ at $2.27 \stackrel{°}{\mathrm{A}}$. Explain the reason for this.

Describe and explain the Jahn-Teller effect in the octahedral complexes of ${\mathrm{Cr}}^{2+}$ and ${\mathrm{Cu}}^{2+}$.

The complex ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ is diamagnetic, but ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ is paramagnetic and has two unpaired electrons. Explain these observations and deduce the structures of the two complexes.

What methods could be used to distinguish between cis and trans isomers of a complex?

Name the individual isomers of each of the following:

(a) $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_2{\mathrm{Cl}}_2\right]$
(b) ${\mathrm{CrCl}}_3\mathbf{·}6{\mathrm{H}}_2\mathrm{O}$
(c) $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{NO}}_2\right]{\left({\mathrm{NO}}_3\right)}_2$
(d) $\left[\mathrm{Co}\right({\mathrm{SO}}_4\left)\right({\mathrm{NH}}_3{)}_5]\mathrm{Cl}$

(e)  

(f) $\mathrm{Co}{\left(\mathrm{en}\right)}_2{\mathrm{NH}}_3{\mathrm{BrSO}}_4$
(g) $\left[\mathrm{Pt}\left({\mathrm{NH}}_3\right)\left({\mathrm{H}}_2\mathrm{O}\right)\left({\mathrm{C}}_5{\mathrm{H}}_5\mathrm{N}\right)\left({\mathrm{NO}}_2\right)\right]\mathrm{Cl}$