In chemistry, a polar bond is a type of bond between two atoms in which electrons are shared unequally.
- Most bonds, however, are neither fully ionic nor fully covalent but are somewhere between the two extremes. Such bonds are called polar covalent bonds, meaning that the bonding electrons are attracted more strongly by one atom than the other so that the electron distribution between atoms is not symmetrical.
- John McMurry, Organic Chemistry 8th ed. (2012), Ch. 2 : Polar Covalent Bonds; Acids and Bases