N i C l 2 [ P ( C 2 H 5 ) 2 ( C 6 H 5 ) ] 2 exhibits temperature dependent magnetic behaviour (paramagnetic, diamagnetic). The coordination geometries of N i 2 + in the paramagnetic and diamagnetic st

Question

N i C l 2 [ P ( C 2 H 5 ) 2 ( C 6 H 5 ) ] 2 exhibits temperature dependent magnetic behaviour (paramagnetic, diamagnetic). The coordination geometries of N i 2 + in the paramagnetic and diamagnetic states are respectively

TestHub · Accepted Answer

For a four coordinated complexes paramagnetic species are generally tetrahedral and diamagnetic species are square planar. As in case of tetrahedral complex weak ligands are used so pairing of inner d-orbitals electrons do not occur so unpaired electrons are present hence there is paramagnetic nature. In case of square planar strong ligands are used so pairing of inner d-orbitals electrons occur so unpaired electrons are not present hence there is diamagnetic nature.
Example: $[N i C l_{4}]^{- 2}, n = 2$ , paramagnetic, tetrahedral
$[N i (C O)_{4}], n = 0$ , diamagnetic, square planar
Same thing is possible in the given complex according to temperature.

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