Among the following complexes, optical activity is possible in:

[C o (N H_{3})_{6}]^{3 +}

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[C o (H_{2} O)_{2} (N H_{3})_{2} C l_{2}]^{+}

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[C r (H_{2} O)_{4} C l_{2}]^{+}

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[C o (C N)_{5} N C]

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Solution

The correct option is A $[C o (H_{2} O)_{2} (N H_{3})_{2} C l_{2}]^{+}$
Optical activity is possible in the complex $[C o (H_{2} O)_{2} (N H_{3})_{2} C l_{2}]^{+}$ .
It is complex of the type $[M a_{2} b_{2} c_{2}]$ where, a, b and c are monodentate ligands.
In this complex, no element of symmetry is present. Hence, it is optically active.
It exists in the form of a pair of enantiomers (d and l isomers).

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Similar questions

Indicate the complex ion which shows geometrical isomerism.
(a) $[C r (H_{2} O)_{4} C l_{2}]^{+}$
(b) $[P t (N H_{3})_{3} C l]$
(c) $[C o (N H_{3})_{6}]^{3 +}$
(d) $[C o (C N)_{5} (N C)]^{3 -}$

Q. Among the following complexes, the one that can exhibit optical activity is:

Q. One among the following complex ions will not show optical activity:

Q. Where among the following metal complexes the one which exhibits optical activity is: (

A A =

bidentate ligand;

X =

monodentate ligand)

Q. Assertion :In a coordination entity

[P t C l_{2} (e n)_{2}]^{2 +}

only the cis-isomer shows optical activity. Reason: Optical isomerism is common in octahedral complexes involving didentate ligands.

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