Question

What is coordination compound?

Answer 1

Chemical bonding provides the energy necessary to hold two different atoms together as part of a chemical compound. Generally atoms use their valence electrons to exchange or share electrons to form bonds. There are different types of compounds. Some of them are ionic, covalent or coordination compounds.

Complete step by step solution:
Strength of the bond depends upon the molecules or atoms involved in the process of bond formation. Major types of chemical bonding are ionic bonding, covalent bonding, hydrogen bonding and metal bonding. When an electron leaves one atom and enters into orbit around another. In this bond, oppositely charged ions attract each other. They are formed between metals and nonmetals. Covalent bond is formed when there is a mutual sharing of electrons between two atoms.
There is a special class of compounds in which metal atoms are bound to a number of anions or neutral molecules which is called complex compounds. These are called coordination compounds. They retain their identity when dissolved in water. Coordination compounds have complex ions and counter ions. Ligands are the molecules or ions coordinating to the metal ion. They have lone pairs to interact with metal. Thus it can be said that the coordination compounds in which metal-ligand bond will be the coordination covalent bond.

Note: The transition metals form a large number of complex compounds. Double salts are different from coordination compounds. Coordination compounds are formed by complete transfer of electrons from a single metal atom which is beyond its normal valency. But double salts are formed from normal valency. The properties of coordination compounds are different from the ligands present in the coordination compound.