Define the following terms with a suitable example of each:
(a) Chelate complex
(b) Ambidentate ligand
OR
Using IUPAC norms, write the formulae for the following complexes:
(a) Tetraamminediaquacobalt(III) chloride
(b) Dibromidobis(ethane-1,2-diamine)platinum(IV) nitrate
(a) When a di or polydentate ligand uses its two or more donor atoms to bind a single metal ion so as to form a ring like structure then the complex form is called chelate complex. E.g. ethylenediamine cadmium complex.
(b) Ambidentate ligand is a ligand which can legate through two different donor atoms. E.g. CN- and NC- (it can legate through C and N both), NO2- and ONO-.
OR
(a) [Co(NH3)4(H2O)2]Cl3
(Ammine and aqua both are neutral ligands)
(b) [PtBr2(en)2](NO3)2
(en i.e. ethylenediamine is a bidentate ligand)