Q41 · CSIR-NET Chemistry, June 2016
Paper: CSIR-NET June 2016 · Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Coordination Chemistry – General · Marks: 2 · Difficulty: Medium
The room temperature magnetic moment ( in BM ) for a monomeric Cu (II) complex is greater than 1.73. This may be explained using the expression:
(a)$\mu_{\mathrm{eff}}=\mu_{s}\left(1-\frac{\lambda a}{\Delta}\right)$
(b)$\mu_{\text {eff }}=\sqrt{n(n+2)}$
(c)$\mu_{\text {eff }}=\sqrt{4 s(s+1)+(L+1)}$
(d)$\mu_{\text {eff }}=g \sqrt{J(J+1)}$
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
For A/E ground terms μ_eff = μ_s(1 − αλ/Δ); with λ negative for d⁹ Cu(II) the moment rises above 1.73 BM.
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