Ligand on the basis of their ligating ability can be classified as:
(i) Monodenate: When the ligands can donate the pair of electrons from one atom, it is called monodenate ligand, e.g., NH3, H2O, CN– etc.
(ii) Didentate: When the ligand can donate the pair of electrons through two atoms of the ligand, it is called didentate ligand, e.g., ethylene diamine
(iii) Polydentate ligands : When the ligand has three or more atoms through which it can donate electron pairs, then the ligands are called polydentate ligands, e.g., edta(ethylene diamine tetra-acetate ion)
On the basis of the following observations made with aqueous solutions, assign primary and secondary valencies to metals in the following compounds:
|
Formula |
Motes of AgCl precipitated with excess AgNO3 |
|
(i) PdCl2.4NH3 |
2 |
|
(ii) NiCl2.6H2O |
2 |
|
(iii) PtCl4.2HCl |
0 |
|
(iv) CoCl3.4NH3 |
1 |
|
(v) PtCl2.2NH3 |
0 |
.
