The exhibition of the highest co-ordination number depends on the availability of vacant orbitals in the central atom. Which of the following elements is not likely to act as central atom in MF63-?
The element M in the complex-ion MF63- has a coordination number of six.
Boron has only s- and p-orbitals and no d – orbitals.
Therefore, at the maximum, it can show a coordination number of 4. Thus, B cannot form a complex of the type MF63-.