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

Question

Among the following complexes, the one that can exhibit optical activity is (A) [CoCl6]3-  (B) [Co(en)Cl4]-  (C) cis - [Co(en)2Cl2]+ (D) trans - [Co(en)2Cl2]+

Tardigrade Admin · Accepted Answer

Optical activity is shown by those complexes, which have optical isomers. Optical isomers are mirror images that cannot be superimposed on each other. Complexes of type

[M (AA)_{3}]

and cis

[M (AA)_{2} B]_{2}

shows optical isomerism. The type of complexes given in the options are as follows:

Complex	Type
$[C o C l_{6}]^{3 -}$	$[M A_{6}]$
$[C o (e n) C l_{4}]^{-}$	$[M (AA) B_{4}]$
cis $[C o (e n)_{2} C l_{2}]^{+}$	cis $[M (AA)_{2} B_{2}]$
trans $[C o (e n)_{2} C l_{2}]^{+}$	trans $[M (AA)_{2} B_{2}]$

Thus, cis

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

shows optical activity

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

$[C o C l_{6}]^{3} -$

$[C o (e n) C l_{4}]^{-}$

cis $- [C o (e n)_{2} C l_{2}]^{+}$

trans $- [C o (e n)_{2} C l_{2}]^{+}$

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

[CoCl6​]3−

[Co(en)Cl4​]−

cis −[Co(en)2​Cl2​]+

trans −[Co(en)2​Cl2​]+

$[C o C l_{6}]^{3} -$

$[C o (e n) C l_{4}]^{-}$

cis $- [C o (e n)_{2} C l_{2}]^{+}$

trans $- [C o (e n)_{2} C l_{2}]^{+}$