Question

For the coordination complex ion ${\left[Co{\left(N{H}_3\right)}_6\right]}^{3+}$
(i) Give the IUPAC name of the complex ion.
(ii) What is the oxidation number of cobalt in the complex ion?
(iii) State the type of hybridisation of the complex ion.
(iv) State the magnetic behaviour of the complex ion.

Answer 1

(i) The IUPAC name of the complex ion is ${\left[Co{\left(N{H}_3\right)}_6\right]}^{3+}$ hexammine cobalt (III) ion.
(ii) The oxidation number of cobalt in the complex ion is $+3$ .
(iii) The type of hybridisation of the complex ion is $d^{2}s{p}^3$.
(iv) The complex ion is diamagnetic due to absence of unpaired electrons.