The spin-only and spin plus orbital magnetic moments of [CrCl₆]³⁻ are

Q55 · CSIR-NET Chemistry, December 2014

Paper: CSIR-NET December 2014 · Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Molecular Orbital Ligand Field · Marks: 2 · Difficulty: Easy

The spin-only and spin plus orbital magnetic moments of $\left[\mathrm{CrCl}_{6}\right]^{3-}$ are

(a)3.87 BM and 5.20 BM

(b)2.84 BM and 5.20 BM

(c)3.87 BM and 6.34 BM

(d)2.84 BM and 6.34 BM

Answer

Answer: A ✓ checked by 4AB · confidence high

Explanation

Cr(III) d³: spin-only √15 = 3.87 BM; spin + orbital with L = 3, S = 3/2: √[4S(S+1) + L(L+1)] = √(15 + 12) = 5.20 BM.

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