is a paramagnetic complex. Identify the INCORRECT statements about this complex. A. The complex exhibits geometrical isomerism. B. The complex is white in colour. C. The calculated spin-only magnetic moment of the complex is 2.84 BM. D. The calculated C

Question

$[Ni {({PPh}_{3})}_{2} {Cl}_{2}]$ is a paramagnetic complex. Identify the INCORRECT statements about this complex.

A. The complex exhibits geometrical isomerism.
B. The complex is white in colour.
C. The calculated spin-only magnetic moment of the complex is 2.84 BM.
D. The calculated CFSE (Crystal Field Stabilization Energy) of Ni in this complex is $- 0.8 Δ_{0} .$
E. The geometrical arrangement of ligands in this complex is similar to that in $Ni {(CO)}_{4} .$

Choose the correct answer from the options given below : [2026]

Smart Achievers · Accepted Answer

(2)

$[Ni {({PPh}_{3})}_{2} {Cl}_{2}]$

$Given : Paramagnetic complex hence it must be tetrahedral so$

$Crystal field splitting :$

$(A) Tetrahedral complex does not show geometrical isomerism.$

$(B) Complex is blue in colour$

$(C) Calculated spin only magnetic moment of the complex is 2.84 B.M.$

$(D) C.F.S.E. = - 0.6 Δ_{t} (4) + 0.4 Δ_{t} (4)$

$= - 0.8 Δ_{t} (not - 0.8 Δ_{o})$

$(E) Ni {(CO)}_{4} is also tetrahedral$

$Hence only A, B, D correct.$

Solution

1 C, D and E Only

2 A, B and D Only

3 C and D Only

4 A and B Only

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