Question

a) For the given complex $\left[Co\right(N{H}_3{)}_{5}Br]S{O}_4$, write the IUPAC name and its ionisation isomer.
b) Which set of d-orbitals of metal ion/atom experience more repulsion in octahedral field created by the ligand?

Answer 1

a) The IUPAC name of the complex $\left[Co\right(N{H}_3{)}_{5}Br]S{O}_4$ is pentammine bromo cobalt (III) sulphate. Its ionisation isomer is $\left[Co\right(N{H}_3{)}_{5}S{O}_4]Br$.
b) Axial set of $d-$orbitals ($d_{x^2-y^2}$ and $d_{z^2}$) of metal ion/atom experience more repulsion in octahedral field created by the ligand. These orbitals are face to face to loigands which are situated at the vertices.