Problem: Which of these square planar complex ions can have cis-trans isomers?A. [Pt(NH3)4]2+B. [Ni(NH3)4]2+C. [Pt(NH3)2Cl2]D. [Pt(NH3)Cl3]–E. [Ni(NH3)3Cl]+

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Isomers are the compounds having the same molecular formulae but different structural formulae. Cis-trans isomerism arises when the groups attached to an atom have a different orientation with respect to each other in three-dimensional space. A cis isomer is the isomer in which the similar groups are oriented on the same side and a trans isomer has similar groups on different sides.


We are being asked to determine which of the given square planar complex ions can have cis-trans isomers.


Recall that cis-trans isomers are geometric isomers. A cis-isomer has similar groups on the same side; while, a trans-isomer has similar groups on different sides.


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Problem Details

Which of these square planar complex ions can have cis-trans isomers?

A. [Pt(NH3)4]2+

B. [Ni(NH3)4]2+

C. [Pt(NH3)2Cl2]

D. [Pt(NH3)Cl3]–

E. [Ni(NH3)3Cl]+

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