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Question:

Which of the following complexes is not expected to exhibit isomerism?

[Pt(NH3)2Cl2]

[Ni(NH3)2Cl2]

[Ni(en)3]2+

[Ni(NH3)4(H2O)2]2+

Solution:

[Ni(NH3)2Cl2] has tetrahedral geometry and thus, does not exhibit isomerism due to the presence of symmetry elements.