[Ni(PPh3)2Cl2] 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

Question

[Ni(PPh3)2Cl2] 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 –0.80. 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 :

(A) A and B only
(B) A, B and D only
(C) C and D only
(D) C, D and E only

Prashant Kotian · Accepted Answer

Correct answer: B. [Ni(PPh3)2Cl2] Given : Paramagnetic complex hence it must be tetrahedral so Crystal field splitting : t e4 Ni+2 = (Ar) 3d8 (A) Tetrahedral complex not show geometrical isomerism. (B) Complex is Blue colour (C) Calculated spin only magnetic moment of the complex is 2.84 B.M. (D) C.F.S.E = –0.6 t (4) + 0.4 t (4) = –0.8 t (not –0.8 0) (E) Ni(CO)4 also tetrahedral Hence only A, B, D correct.

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