dative bond

1. This is called a dative bond.
   这种化学键称为配位键。
2. The strength of the dative bond deponds not only on the substituents R, but also on the skeletal structure of the parent ring.
   研究表明配位键的强度不仅受取代基R的影响，而且还与环结构的变化有关。

noun

1. a covalent bond in which both electrons are provided by one of the atoms

   Synonym:    coordinate bond