Question

Which one of the following complexes is not expected to exhibit isomerism? (a) [Ni(NH3)4(H2O)2]^2+

Answer 1

Option (c).  [Ni(NH3)2Cl2] is the correct answer.

                Because, it has tetrahedral geometry and thus, does not exhibit isomerism due to the presence of symmetry elements.

Answer 2

(c) [Ni(NH3)2Cl2]

Explanation:

The options are incomplete in the question. Please refer the attached picture for the options.

Due to the presence of symmetry elements, Ni(NH3)2Cl2 does not exhibit isomerism. The Geometry of Hexaamminenickel chloride is square planar. The reason for this is that the nickel is giving away four electrons and has no extra electron pairs floating around.

Option (c) is the answer. Hexaamminenickel chloride.