17 public questions tagged with this topic.
[MnCl₄]2− (Mn₂+, d5) in a tetrahedral field with weak field Cl− is high spin (e2 t23), with 5 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds
Fe₃+ (d5) in [FeCl₄]− (tetrahedral) with weak field Cl− is high spin (5 unpaired electrons).
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds
Fe₂+ (3d6). H₂O is weak field → high spin: t2g4 eg2, 4 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Nomenclature of Coordination Compounds
[Co(CN)6]3− (Co₃+, d6) with strong field CN− is low spin (t2g6), with 0 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Optical Isomerism and Linkage Ionisation Solvate
Co₃+ (d6) in [CoF₆]3− (octahedral) with weak field F− is high spin: t2g4 eg2, giving 4 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Optical Isomerism and Linkage Ionisation Solvate
Cr₃+ (d3) has t2g3, 3 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Optical Isomerism and Linkage Ionisation Solvate
[Mn(CN)6]3− (Mn₃+, d4) with strong field CN− is low spin (t2g4), 2 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Geometrical Isomerism in Coordination Compounds
[Mn(H₂O)6]2+ (Mn₂+, d5) with weak field H₂O is high spin (t2g3 eg2), 5 unpaired electrons, the maximum among options.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Crystal Field Theory - CFT and Crystal Field Splitting and CFSE
[MnF₆]3− (Mn₃+, d4) high spin has 4 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Crystal Field Theory - CFT and Crystal Field Splitting and CFSE
For d4 high spin: t2g3 eg1, 4 unpaired. Mn₃+ fits.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Crystal Field Theory - CFT and Crystal Field Splitting and CFSE
Mn₂+ (d5) in [Mn(H₂O)6]2+ with weak field H₂O is high spin: t2g3 eg2, 5 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Crystal Field Theory - CFT and Crystal Field Splitting and CFSE
Ni₂+ (d8) in [Ni(NH₃)6]2+ (octahedral) with NH₃ (moderate field) is high spin: t2g6 eg2, giving 2 unpaired electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Bonding - Valence Bond Theory and Hybridisation
