Out of the following two coordination entities which is chiral (optically active)?
(a) $c i s - {[C r {C l}_{2} {(O x)}_{2}]}^{3 +}$
(b) $t r a n s - {[C r {C l}_{2} {(O x)}_{2}]}^{3 -}$

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Solution

Optical isomers are mirror images that can not be super imposed on each other, hence,
$c i s {[C r C l_{2} {(O X)}_{2}]}^{3 -}$ is chiral,
$t r a n s {[C r C l_{2} {(O X)}_{2}]}^{3 -}$ is symmetrical and not optically active.
See the figure.

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Similar questions

Which of the following statements is correct regarding the chirality (optical isomerism) of the cis and trans isomers of the type $M (a a)_{2} b_{2}$ (M stands for a metal, a and b are achiral ligands and aa is a bidentate ligand) ?

Q. Match List-I with List-II:

List – I	List – II
(a) [Co(NH₃)₆] [Cr(CN)₆]	(i) Linkage isomerism
(b) [Co(NH₃)₃ (NO₂)₃]	(ii) Solvate isomerism
(c) [Cr(H₂O)₆]Cl₃	(iii) Coordination isomerism
(d) cis-[CrCl₂(ox)₂]^3-	(iv) Optical isomerism

Choose the correct answer from the options given below:

Q. Which of the following compounds show optical isomerism?
I. cis

- [C o (N H_{3})_{4} C l_{2}]^{+}

II. trans

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

III. cis

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

IV.

[C o (e n)_{3}]^{3 +}

Q. Which of the following will show optical isomers?
(I)

C i s - [C o (N H_{3})_{2} (e n)_{2}]^{3 +}

(II)

T r a n s - [I r C l_{2} (C_{2} O_{4})_{2}]^{3 -}

(III)

[R h (e n)_{3}]^{3 +}

(IV)

c i s - [I r (H_{2} O)_{3} C l_{3}]

Identify the optically active compounds from the following
(a) $[C o (e n)_{3}]^{3 +}$
(b) $t r a n s - [C o (e n)_{2} C l_{2}]^{+}$
(c) $c i s - [C o (e n)_{2} C l_{2}]^{+}$
(d) $[C r (N H_{3})_{5} C l]$

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Out of the following two coordination entities which is chiral (optically active)?(a) cis−[CrCl2(Ox)2]3+(b) trans−[CrCl2(Ox)2]3−

Optical isomers are mirror images that can not be super imposed on each other, hence, cis[CrCl2(OX)2]3− is chiral,trans[CrCl2(OX)2]3− is symmetrical and not optically active.See the figure.

Out of the following two coordination entities which is chiral (optically active)?
(a) $c i s - {[C r {C l}_{2} {(O x)}_{2}]}^{3 +}$
(b) $t r a n s - {[C r {C l}_{2} {(O x)}_{2}]}^{3 -}$

Optical isomers are mirror images that can not be super imposed on each other, hence,
$c i s {[C r C l_{2} {(O X)}_{2}]}^{3 -}$ is chiral,
$t r a n s {[C r C l_{2} {(O X)}_{2}]}^{3 -}$ is symmetrical and not optically active.
See the figure.