(a) (i) ${\left[\mathit{C}\mathit{O}{\left({\mathit{N}\mathit{H}}_3\right)}_5\left(\mathit{O}\mathit{N}\mathit{O}\right)\right]}^{2+}$
IUPAC : Pentaammine onitrito cobalt (III) ion
(ii) ${\mathit{K}}_2\left[{\mathit{N}\mathit{i}\mathit{C}\mathit{l}}_4\right]$
potassiumtetra chlornickelate (II)
[OR]
(b) (i) Chelate complex: A class of coordination or complex compounds consisting of a central metal atom attached through two or more coordinate bonds with ligands in a cyclic or sing structure.
Example : EDIA
(ii) Heteroleptic complex: Coordination complexes which contain more than one type of ligands.
Example: ${\left[\mathit{F}\mathit{e}{\left({\mathit{N}\mathit{H}}_3\right)}_4{\mathit{C}\mathit{l}}_2\right]}^{+}$