# Which of the following ligands is expected to bidentate Option 1) Br Option 2) $C_{2}O_{4}^2^{-}$ Option 3) $CH_{3}NH_{2}$ Option 4) $CH_{3} C \equiv N$

Answers (1)
P Prateek Shrivastava

As we have learned

Types of Ligands on the basis of Connectivity -

(i) Unidentate - ligand is bound to metal ion through a single donor atom.

eg: $Cl^{-}, H_{2}O and NH_{3}$

(ii) Bidentate : when ligand can bind through two donor atoms

eg: $CH_{2}NH_{2}-CH_{2}NH_{2}$

(iii) Polydentate - when ligand bind to two or more donor atoms

(iv) Hexadentate - type of polydentate having six donor atoms

(v) Ambidentate- which can ligate through two different atoms at a time

eg. $M\leftarrow SCN$ & $M\leftarrow NCS$

- wherein

All ambidentate ligands are monodentate but all monodentate ligands are not ambidentate

Co-ordination number is equal to total number of ligands in a complex.

Option 1)

Br

Option 2)

$C_{2}O_{4}^2^{-}$

Option 3)

$CH_{3}NH_{2}$

Option 4)

$CH_{3} C \equiv N$

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