11 public questions tagged with this topic.
Fe₂+ (d6), weak field H₂O, octahedral, high spin: t2g4 eg2. Ratio = 2 : 4 = 1 : 2.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number
[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
Co₃+ (d6) in [Co(H₂O)6]3+ (octahedral) with weak field H₂O is high spin: t2g4 eg2, giving 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
[Co(CN)6]3− (Co₃+, d6) with strong field CN− is low spin (t2g6).
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Optical Isomerism and Linkage Ionisation Solvate
Cr₃+ (d3) in [Cr(NH₃)6]3+ (octahedral) with moderate field NH₃ has t2g3, so 3 electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Geometrical Isomerism in Coordination Compounds
[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
[FeCl₆]4− has Cl−, the weakest field ligand, giving the smallest Δo.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Crystal Field Theory - CFT and Crystal Field Splitting and CFSE
[Fe(CN)6]4− has CN−, a stronger field ligand than NH₃, resulting in a larger Δo.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Crystal Field Theory - CFT and Crystal Field Splitting and CFSE
[Ni(CN)4]2− with strong field CN− is square planar (dsp2).
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Bonding - Valence Bond Theory and Hybridisation
