The geometry and magnetic behaviour of the complex [ Ni(CO) _4] are

NEET 2018 Chemistry question

The geometry and magnetic behaviour of the complex are

(1)Square planar geometry and paramagnetic
(2)Tetrahedral geometry and diamagneticCorrect
(3)Square planar geometry and diamagnetic
(4)Tetrahedral geometry and paramagnetic

Answer: (2)

Solution

In nickel is in the zero oxidation state: Ni is . CO is a strong-field ligand, so the two 4s electrons shift into the 3d level and all ten electrons pair up in the 3d orbitals (), leaving the 4s and three 4p orbitals vacant for

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Question ID VK-092267