A double covalent bond is a chemical bond in which two pairs of electrons are shared between two atoms. It is stronger than a single covalent bond, in which only one pair of electrons is shared. Double covalent bonds are found in many organic molecules, such as alkenes and alkynes.

In a double covalent bond, the two atoms are held together by two shared pairs of electrons. This creates a stronger bond than a single covalent bond, because there are more electrons holding the atoms together. The electrons in a double covalent bond are arranged in a pi (π) bond. A pi bond is formed when two atomic orbitals overlap side-by-side.

Double covalent bonds are typically shorter and stronger than single covalent bonds. This is because the two pairs of electrons in a double covalent bond are held closer together than the one pair of electrons in a single covalent bond. The shorter bond length and stronger bond strength of double covalent bonds make them less likely to break than single covalent bonds.

Double covalent bonds are found in many important molecules, such as alkenes, alkynes, and aromatic compounds. Alkenes are hydrocarbons that have at least one carbon-carbon double bond. Alkynes are hydrocarbons that have at least one carbon-carbon triple bond. Aromatic compounds are hydrocarbons that have a ring of carbon atoms.