Halogen bonding (XB) is the non covalent interaction that occurs between a halogen atom (Lewis acid) and a Lewis base.

There are four commonly mentioned types of non covalent interactions hydrogen bonds, ionic bonds, van der Waals forces, and hydrophobic interactions.

It was clear in theory that covalent bonds in biological molecules could provide the structural stability needed to hold genetic information in cells.

Physical properties The crystalline structure is held together with strong covalent bonding similar to diamonds, that allows moissanite to withstand high pressures up to 52.1 gigapascals.

In a bulk material, all the bonding requirements (be they ionic, covalent, or metallic) of the constituent atoms of the material are filled by other atoms in the material.

In supramolecular chemistry, host guest chemistry describes complexes that are composed of two or more molecules or ions that are held together in unique structural relationships by forces other than those of full covalent bonds.

The Grotthuss mechanism is the mechanism by which an 'excess' proton or protonic defect diffuses through the hydrogen bond network of water molecules or other hydrogen bonded liquids through the formation or cleavage of covalent bonds.