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.

在水乙酸锌与1,5-萘二胺形成位络合物的过程，水乙酸锌的结构从双齿型转变成单齿型。

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

领一、二、三等的位置时被称为单齿、双齿、三齿等。