These coordination complexes are derived from the cupric ion and the conjugate base of benzoic acid.

Copper benzoate made from sodium benzoate for use in fireworks may result in strong yellow dilution of the flame unless the precipitate is carefully washed to remove sodium ions (which emit bright yellow).

[2] Copper(II) benzoate exists in at least two structural forms, depending on the degree of hydration.

Typically, one site on each copper center is occupied by water, which can be replaced by other ligands.

[4] A hydrated form is also known, wherein each Cu(II) centre is bound to four water ligands and a bidentate O,O-benzoate.