tegenanion
A counteranion, also referred to as a counter-anion, is the anion paired with a given cation in a salt or ionic compound. It serves to balance the overall electrical charge of the solid or solution and defines the specific salt form of the compound. In a salt, the cation and anion are not covalently bonded but are held together by electrostatic forces.
A cation can form salts with many different anions, and the choice of counteranion strongly influences the
The counteranion affects a range of properties beyond simple charge balance. Solubility in water and organic
In naming, the salt is typically described by the cation first and the counteranion second (for example,