The formula `Co(NH_(3))_(4)` `CO_(3)` Br represents three isomers
(i) Draw their structures
(ii) How would you distinguish these isomers ?

Explanation

The structures of the three isomers represented by the given formula are give in the figure In isomers (a) and (b) `CO_(3)^(2-)` ion acts as a monodentate ligand but in isomer (c ) this ion acts as a bidentate ligand

(ii) Tese isomers can be distinguished by the following methods
(a) Chemical method When isomer (c ) is treated with `AgNO_(3)` solution yellow ppt of AgBr is obtained
(b) Infra -red spectroscopic method The absorption spectra of isomers (a) and (b )are different from that of isomer (c) since in (a) and (b) `CO_(3)^(2-)` ion acts as a monodentate ligand but in (c) this ion acts as a bidentate ligands .