Coordination Compounds

Coordination Compounds

Question

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

  • 1.82 BM

  • 5.46 BM 

  • 2.82 BM

  • 1.41 BM

Answer

C.

2.82 BM

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

straight mu subscript straight B. straight M end subscript space equals space square root of straight n left parenthesis straight n plus 2 right parenthesis end root space equals space square root of 2 left parenthesis 2 plus 2 right parenthesis end root space equals space square root of 8 space equals space 2.82 space BM

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