Coordination CompoundHard
Question
The geometry of [NiCI4]2- and [NiCI2 (PMe3)2] are :
Options
A.both square planar.
B.tetrahedral and square planar respectively.
C.both tetrahedral.
D.square planar and tetrahedral respectively.
Solution
In both complexes the oxidation state of Ni is +2. In [NiCl4]2- the Cl- is a weak field ligand, so it does not compel for pairing. Then,
[NiCI4]2-
Hence NiCI4 is paramagnetic and tetrahedral.
In [NiCI2 (PMe3)2] the trimethyl phosphine is a strong field ligands; so it compels for the pairing of electrons. Then,
[NiCI2 (PMe3)2]
Hence [NiCI2 (PMe3)2] is diamagnetic and square planar.
[NiCI4]2-
Hence NiCI4 is paramagnetic and tetrahedral.
In [NiCI2 (PMe3)2] the trimethyl phosphine is a strong field ligands; so it compels for the pairing of electrons. Then,
[NiCI2 (PMe3)2]
Hence [NiCI2 (PMe3)2] is diamagnetic and square planar.
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