Question

The coordination number of platinum in complexes is always _____. How do you know this?

Answer 1

for pt^+ 2 rightarrow CN rightarrow 4 for pt^+ 4 rightarrow CN rightarrow 6 due to charge density, if + alpha charge is there on pt then its charge density is not that much. so it is not able to attract that much of ligand toward itself. And if + 4 charge is there then its charge density is higher and it is able to attract sufficient ligands towards itself thats why pt + 4 have higher co ordination number compare to pt^+ 2