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[CoCl₄]2− (Co₂+, d7) with weak field Cl− is tetrahedral and high spin (3 unpaired electrons), making it paramagnetic.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Colour and Magnetic Properties and Stability and Importance
[CoF₄]2− (Co₂+, d7) with 4 ligands is tetrahedral, using sp3 hybridization due to weak field F−.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Bonding - Valence Bond Theory and Hybridisation
In NF₃ , nitrogen has four electron pairs (three bonding, one lone), giving tetrahedral electron geometry, but the lone pair results in a trigonal pyramidal shape.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: VSEPR Theory and Shapes of Molecules
In H₂S , sulfur has 4 electron pairs (2 bonding, 2 lone), giving a tetrahedral electron geometry ( sp³ ), but a bent shape due to lone pairs.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: VSEPR Theory and Shapes of Molecules
In H₂S , sulfur is sp³ hybridized with 4 electron pairs (2 bonding, 2 lone), reducing the bond angle to ~92° due to lone pair repulsion.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Covalent Bonding - Bond Parameters and Polarity and Fajan's Rule
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