Geometrical shapes of the complexes formed by the reaction of Ni^ 2+ with Cl^- , CN^- and H_2O , respectively, are

JEE Advanced 2011 Chemistry question

Geometrical shapes of the complexes formed by the reaction of with , and , respectively, are

(A)octahedral, tetrahedral and square planar
(B)tetrahedral, square planar and octahedralCorrect
(C)square planar, tetrahedral and octahedral
(D)octahedral, square planar and octahedral

Answer: (B)

Solution

is . With the weak-field ligand it forms : no electron pairing, hybridisation, tetrahedral (paramagnetic). With the strong-field ligand it forms : the two unpaired d electrons pair up, leaving one 3d

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Question ID VK-025876