First slide

Bonding between metal and ligand

Question

Which of the following is a tridentate ligand ?

Moderate

A

${NO}_{2}^{-}$
B

Oxalate ion
C

Glycinate ion
D

dien

Solution

Dien (Diethylenetriamine) has following structure
H₂N^∙∙−CH₂−CH₂−N^∙∙H−CH₂−CH₂−N^∙∙H₂.
The number of donor atoms is three hence it is a tridentate ligand. Each nitrogen atom is a donor atom.

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