How many geometrical isomers are possible for each of the f…

Chemistry Co-ordinatios Compounds Isomerism in Coordination Compounds Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

How many geometrical isomers are possible for each of the following complexes?

[Pt(NH 3 ) 2 (SCN) 2 ]

[CoCl 2 Br 2 ] 2– (tetrahedral)

[Co(NH 3 ) 3 (NO 2 ) 3 ]

[Pt(en)Cl 2 ] (e) [Cr Br 2 (en) 2 ] + (f) [Rh(en) 3 ] 3+

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Two None Two None (e) Two (f) None

Sol. [Pt(NH 3 ) 2 (SCN) 2 ] exists in cis and trans forms as given below :

[CoCl 2 Br 2 ] 2– (tetrahedral) : In tetrahedral all positions are adjacent to one another. So it does not exhibit geometrical isomerism.

[Pt(en)Cl 2 ] : It exists in one form.

(e) [CrBr 2 (en) 2 ] + :

(f) [Rh(en) 3 ] 3+ does not show geometrical isomerism as all donating atoms are of one type i.e nitrogen atoms.

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