In 20th century, German scientist Werner succeeded in clarifying the structures of the five compounds consisting of platinum, chlorine, and ammonia. Some of the properties of these compounds are shown below in the table.
| Compound |
Formula |
Total number of free ions in the formula |
Number of free CI-1 ions in the formula |
| A |
PtCl4.6NH3 |
5 |
4 |
| B |
PtCl5.NH3 |
4 |
3 |
| C |
PtCl4.NH3 |
3 |
2 |
| D |
PtCl3.NH3 |
2 |
1 |
| E |
PtCl2.NH3 |
0 |
0 |
(i) What is the oxidation state and coordination number of Pt in compound C?
(ii) Which of the complexes formed for the compounds A, B, C, and D have structural isomers?
(iii) Predict the shape of each compound.
