The Science of Existence (67-3-1) Bond Orders

 Bond Orders

A covalent bond may be of a single, double, or triple electron pair. Quintuple bonds exist, but are rare, confined to certain metals. A quintuple bond involves 10 electrons bonding between 2 metal centers.

Diatomic fluorine (F2) is an exemplary single bond. Molecular oxygen (O2) is cozy as a double bond, while molecular nitrogen (N2) forms a triple bond.

The higher the bond order, the tighter the bond – literally: bond length shortens. Bond energy increases with bond order. Tighter bonds are energetically stronger. Hence, the triple bond of dinitrogen is a particularly strong one.