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单、、三等。

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.

乙酸锌与1,5-萘二胺形成配位络合物的过程中，乙酸锌的结构从型转变成单型。