Chapter 23

Draw the structures of \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+},\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) and \(\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]\). Write the hybridisation of atomic orbitals of the transition metal in each case.

A compound of vanadium has a magnetic moment of \(1.73 \mathrm{BM}\). Work out the electronic configuration of the vanadium ion in the compound.

Identify the complexes which are expected to be coloured. Explain [1994 - 2 Marks] (i) \(\left[\mathrm{Ti}\left(\mathrm{NO}_{3}\right)_{4}\right]\) (ii) \(\left[\mathrm{Cu}\left(\mathrm{NCCH}_{3}\right)_{4}\right]^{+} \mathrm{BF}_{4}^{-}\) (iii) \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+} 3 \mathrm{Cl}^{-}\) (iv) \(\mathrm{K}_{3}\left[\mathrm{VF}_{6}\right]\)