SSC MTS EXAM

Detailed explanation-1: -’Ligancy’ is another term used to refer to the coordination number of an atom. The atoms, ions, or molecules that are bonded to the central atom (or molecule/ion) are called ligands.

Detailed explanation-2: -In chemistry, crystallography, and materials science, the coordination number, also called ligancy, of a central atom in a molecule or crystal is the number of atoms, molecules or ions bonded to it. The ion/molecule/atom surrounding the central ion/molecule/atom is called a ligand.

Detailed explanation-3: -For example: In [Mo(CN)8]4–, The central metal Mo is linked to eight cyanide ion, thus the metal atom has coordination number 8. Similarly, in [Pt(NH3)4]2+, Pt is linked to four NH3molecules. Hence, its coordination number is 4.

Detailed explanation-4: -The coordination number refers to the number of atoms that a central metal atom is most stably bound to. For example, a metal ion that is bound to 6 other atoms has a coordination number of 6. This gives coordination complexes several different shapes depending on how many atoms are bound to the central metal atom.