When the complex of anhydrous zinc acetate with 1,5-naphthalene diamine was formed, the anhydrous zinc acetate changed from a bidentate ligand to a unidentate ligand.

在无水乙1,5-萘二胺形配位络合物的过程，无水乙的结构从双齿型转齿型。

Ligands occupying one, two, three, and so on, positions are referred to as unidentate, bidentate, tridentate, and so on.

配体占领一、二、三等的位置时被称为齿、双齿、三齿等。