Identify complex salts in which spin only magnetic moment is higher as compared of [ CuCl 4 ] 2 −

Question

Identify complex salts in which spin only magnetic moment is higher as compared of [ CuCl 4 ​ ] 2 −

TestHub · Accepted Answer

Spin-only magnetic moment depends on the number of unpaired electrons, given by $μ \propto n (n + 2)$ .

[CuCl₄]²⁻ has 1 unpaired electron (d⁹).

[NiCl₄]²⁻ (d⁸ high spin), [CoCl₄]²⁻ (d⁷ high spin), and [NiF₆]⁴⁻ (d⁸ high spin octahedral) all have more unpaired electrons than the Cu(II) complex.

Hence, their magnetic moments are higher, while [PtF₆]²⁻ (low spin/less unpaired) is not included.

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