Which of the following has an optical isomer?

Question

Which of the following has an optical isomer? (A) [ Co ( NH 3)3 Cl ]+ (B) [ Co (e n)( NH 3)2]2+ (C) [ Co ( H 2 O )4(e n)]3+ (D) [ Co (e n)2( NH 3)2]3+

Tardigrade Admin · Accepted Answer

Optical isomerism is usually exhibited by octahedral compounds of the type

[M (AA)_{2} B_{2}],

where

(AA)

is a symmetrical bidentate ligand. Square planar complexes rarely show optical isomerism on account of presence of axis of symmetry. Thus among the given options,

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

exhibits optical isomerism.

Q. Which of the following has an optical isomer?

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

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

$[C o (H_{2} O)_{4} (e n)]^{3 +}$

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

Q. Which of the following has an optical isomer?

[Co(NH3​)3​Cl]+

[Co(en)(NH3​)2​]2+

[Co(H2​O)4​(en)]3+

[Co(en)2​(NH3​)2​]3+

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

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

$[C o (H_{2} O)_{4} (e n)]^{3 +}$

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