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Total Electron Pairs (EP) = 2
Electron Pair Arrangement?
Hybridization of central atom?
BP = 2, LP = 0 → Molecular Geometry? Bond Angle?
Example?
Electron Pair Arrangement: Linear
Hybridization: sp (1 s + 1 p orbital)
Molecular Geometry: Linear
Bond Angle: 180°
Example: CO₂ (O=C=O), BeCl₂
Total Electron Pairs (EP) = 3
Electron Pair Arrangement?
Hybridization of central atom?
Case 1: BP = 3, LP = 0 → Molecular Geometry? Bond Angle?
Case 2: BP = 2, LP = 1 → Molecular Geometry? Bond Angle?
Examples?
Electron Pair Arrangement: Trigonal Planar
Hybridization: sp² (1 s + 2 p orbitals)
Case 1: Molecular Geometry = Trigonal Planar; Bond Angle = 120° (Example: BF₃, SO₃)
Case 2: Molecular Geometry = Bent (V-shaped); Bond Angle ≈ 120° (Example: SO₂, O₃)
Total Electron Pairs (EP) = 4
Electron Pair Arrangement?
Hybridization of central atom?
Case 1: BP = 4, LP = 0 → Molecular Geometry? Bond Angle?
Case 2: BP = 3, LP = 1 → Molecular Geometry? Bond Angle?
Case 3: BP = 2, LP = 2 → Molecular Geometry? Bond Angle?
Examples?
Electron Pair Arrangement: Tetrahedral
Hybridization: sp³ (1 s + 3 p orbitals)
Case 1: Tetrahedral; 109.5° (Example: CH₄, CCl₄)
Case 2: Trigonal Pyramidal; <109.5° (Example: NH₃, PCl₃)
Case 3: Bent (V-shaped); <109.5° (Example: H₂O, H₂S)
Total Electron Pairs (EP) = 5
Electron Pair Arrangement?
Hybridization of central atom?
Case 1: BP = 5, LP = 0 → Molecular Geometry? Bond Angle?
Case 2: BP = 4, LP = 1 → Molecular Geometry? Bond Angle?
Case 3: BP = 3, LP = 2 → Molecular Geometry? Bond Angle?
Case 4: BP = 2, LP = 3 → Molecular Geometry? Bond Angle?
Examples?
lectron Pair Arrangement: Trigonal Bipyramidal
Hybridization: dsp³ (1 d + 1 s + 3 p orbitals)
Case 1: Trigonal Bipyramidal; 90° (axial-equatorial), 120° (equatorial-equatorial) (Example: PCl₅)
Case 2: Seesaw (Distorted Tetrahedral); 90° & 120° (Example: SF₄)
Case 3: T-shaped; 90° (Example: ClF₃)
Case 4: Linear; 180° (Example: XeF₂)
Total Electron Pairs (EP) = 6
Electron Pair Arrangement?
Hybridization of central atom?
Case 1: BP = 6, LP = 0 → Molecular Geometry? Bond Angle?
Case 2: BP = 5, LP = 1 → Molecular Geometry? Bond Angle?
Case 3: BP = 4, LP = 2 → Molecular Geometry? Bond Angle?
Examples?
Electron Pair Arrangement: Octahedral
Hybridization: d²sp³ (2 d + 1 s + 3 p orbitals)
Case 1: Octahedral; 90° (Example: SF₆, MoF₆)
Case 2: Square Pyramidal; ≈ 90° (Example: ClF₅)
Case 3: Square Planar; 90° (Example: XeF₄)