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[NiCl₄]2− (Ni₂+, d8) is tetrahedral with weak field Cl−. With strong field CN−, it becomes [Ni(CN)4]2−, square planar.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Crystal Field Theory - CFT and Crystal Field Splitting and CFSE
[Fe(CN)6]3− (Fe₃+, d5) with strong field CN− is low spin, using d2sp3.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Bonding - Valence Bond Theory and Hybridisation
[Cr(H₂O)6]3+ is octahedral, using d2sp3.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Bonding - Valence Bond Theory and Hybridisation
[Fe(CO)5] is trigonal bipyramidal, using dsp3 hybridization.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Bonding - Valence Bond Theory and Hybridisation
[Cu(NH₃)4]2+ is square planar, using dsp2 hybridization.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Bonding - Valence Bond Theory and Hybridisation
[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
The hexacyanoferrate(II) ion has octahedral geometry with d 2 sp 3 hybridization.
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Oxidation States and Colour and Magnetic Properties of d-Block
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