Question

The magnetic moment (spin only) of [NiCl4]2– is

• A. 1.82 BM
• B. 5.46 BM
• C. 2.82 BM
• D. 1.41 BM

Answer 1

Answer: (C)

2.82 BM

Answer 2

In the paramagnetic and tetrahedral complex [NiCl4]2–, the nickel is in +2 oxidation state and the ion has the electronic configuration 3d8. The hybridisation scheme is as shown in figure.

Ni2+, [Ar]3d8

[NiCl4]2–

sp3 hybrid orbitals

$\mu$B.M. = $\sqrt { n ( n + 2 ) }$ = $\sqrt { 2 ( 2 + 2 ) }$ = $\sqrt { 8 }$ = 2.82 BM