14 public questions tagged with this topic.
[Mn(H₂O)6]2+ (Mn₂+, d5) with weak field H₂O is high spin (t2g3 eg2), 5 unpaired electrons, matching a free d5 ion’s magnetic moment.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Fe₃+ (d5) in [Fe(H₂O)6]3+ (octahedral) with weak field H₂O is high spin (5 unpaired electrons). Magnetic moment = √[5(5+2)] = √35 ≈ 5.92 BM.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Fe₃+ (d5) in [FeF₆]3− (octahedral) with weak field F− is high spin (5 unpaired electrons). Magnetic moment = √[5(5+2)] = √35 ≈ 5.92 BM.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Ni₂+ (d8) in [Ni(H₂O)6]2+ (octahedral) with weak field H₂O is high spin (t2g6 eg2), 2 unpaired electrons. Magnetic moment = √[2(2+2)] = √8 ≈ 2.83 BM.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Co₂+ (d7) in [Co(H₂O)6]2+ (octahedral) with weak field H₂O is high spin (t2g5 eg2), 3 unpaired electrons. Magnetic moment = √[3(3+2)] = √15 ≈ 3.87 BM.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Cu₂+ (d9) has 1 unpaired electron. μ ≈ 1.73 BM.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Cr₃+ (d3) in [Cr(H₂O)6]3+ has t2g3, 3 unpaired electrons. μ ≈ 3.87 BM.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Co₂+ (d7) in [CoCl₄]2− (tetrahedral) with weak field Cl− is high spin (3 unpaired). μ ≈ 3.87 BM.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Fe₃+ (d5) in [FeF₆]3− with weak field F− is high spin (5 unpaired). μ ≈ 5.92 BM.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Mn₂+ (d5) in tetrahedral [MnCl₄]2− with weak field Cl− is high spin (5 unpaired electrons). μ = √35 ≈ 5.92 BM.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
Using the spin-only formula: μ = √[n(n+2)] = √[3(3+2)] = √15 ≈ 3.87 BM
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Oxidation States and Colour and Magnetic Properties of d-Block
Mn 2+ has 5 unpaired electrons (3d 5 ), giving the highest magnetic moment (5.92 BM).
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Oxidation States and Colour and Magnetic Properties of d-Block
