Difference Between Bidentate and Ambidentate Ligands

Key Difference – Bidentate vsAmbidentateLigands

Thekey differencebetween bidentate and ambidentate ligands is thatbidentate ligands can bind to a central atom via two bonds at the same time whereas ambidentate ligands can form two bonds with a central atom, but form only one bond at a time.

Ligands是富含电子的分子或阴离子，可以将单电子对捐赠给具有正电荷的原子。基于它们可以用原子形成的键数，有几种称为单次配体，双态配体，多脱态配体等的配体。

CONTENTS

1.Overview and Key Difference
2.什么are Bidentate Ligands
3.什么是Ambidentate配体
4.Similarities Between Bidentate and Ambidentate Ligands
5.Side by Side Comparison – Bidentate vs Ambidentate Ligands in Tabular Form
6.概括

什么are Bidentate Ligands?

Bidentate ligands are molecules or anions that can bind to an atom via two协调共价键. Coordinate covalent bonds are a type of covalent bonds that are formed when an electron-rich chemical species donate lone electron pairs to an electron-deficient chemical species such as positively charged metal atoms. When ligands and cations bind in this way, acoordination compoundis formed. The atom to which the ligands are bonded to is called thecoordination center.

A bidentate ligand has two donor atoms. This means, there are two atoms that can donate their lone electron pairs. Some common examples for the bidentate ligands include oxalate ion (C₂O₄^2-）具有两个氧原子作为供体原子和乙二胺（C₂H₄（NH₂）₂），它们具有两个氮原子作为供体原子。

什么是Ambidentate配体?

Ambidentate ligands are molecules or ions that have two donor atoms but are capable of binding with an atom via only one donor atom at a time. Examples of ambidentate ligands include thiocyanate ion (SCN^–) in which both sulfur atom and a nitrogen atom are capable of donating lone electron pairs. But either the sulfur atom or nitrogen atom can bind to the coordination center at a time.

Another example is nitrate ion (NO₂^–) in which both nitrogen atom and oxygen atom can become a donor atom.

BIDENATE和AMBIDENTATE配体之间有什么相似之处？

• Both Bidentate and Ambidentate ligands have two donor atoms.
• Both ligands have at least two atoms with lone electron pairs.

什么is the Difference Between Bidentate and Ambidentate Ligands?

Bidentate vs Ambidentate Ligands
Bidentate ligands are molecules or anions that can bind to an atom via two coordinate covalent bonds.	Ambidentate ligands are molecules or ions that have two donor atoms but are capable of binding with an atom via only one donor atom at a time.
Bond Formation
Bidentate ligands are capable of forming two coordinate covalent bonds at a time.	Ambidentate配体能够一次形成一个坐标共价键。
Examples
二齿配体的实例包括乙二胺和草酸根离子。	Examples of ambidentate ligands include thiocyanate ion and nitrate ion.

概括–Bidentate vsAmbidentateLigands

Ligands are molecules or ions that can bind with electron-deficient atoms via coordinate covalent bonds. Bidentate ligands and ambidentate ligands are such two ligand forms. The difference between bidentate and ambidentate ligands is that bidentate ligands can bind with a central atom via two bonds at the same time whereas ambidentate ligands are capable of forming two bonds with a central atom but form only one bond at a time.

Reference:

1.“配体|配体的类型|螯合配体，牙齿，Ambidentate配体|化学|Byju的。”化学，Byjus班，2018年3月8日。Available here
2. Libretexts. “Ligands.” Chemistry LibreTexts, Libretexts, 19 Jan. 2018.Available here

Image Courtesy:

1.’M-en1’By No machine-readable author provided (Public Domain) viaCommons Wikimedia
2.’phscn-phncs-comparparison’（公共领域）Commons Wikimedia