Valence Shell Electron Pair Repulsion (VSEPR)
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SN*  Lone
pairs 
Molecular Geometry Example Bond
angle
2 0 HCN 180°
  0 CO2 180°
  0 HCCH 180°
  0 BeH2 180°
  0 N3 180°
  1 HCN  
  1 N2  
3 0 CO3-2 120°
0 NO3 120°
0 BH3 120°
  0 H2CO 116.1 HCH
121.9 HCO
  0 H2CO3 109 OCO
126 O=CO
  0 CCl2CCl2 115.7 ClCCl
122.2 ClCC
  0 SO3 120°
  1 O3 116.8°
  1 NO2 115°
  1 CH2NCH3 117°
  2 O2  
  2 CO2  
4 0 CH4 109.5°
  0 NH4+ 109.5°
  0 BF4 109.5°
  0 CH3CH3 108 HCH
110.9 HCC
  0 CH3NH2 108.4 HCH
110 HCN
  0 CH3OH 109.0 HCH
109.9 HCO
  0 BH3NH3 113.5 HBH
105.0 HBN
  0 BH3NH3 107.9 HNH
111.0 HNB
  0 POCl3 104.5 ClPCl
118.8 OPCl
  0 NSF3 94 FSF
123 NSF
  0 PO4-3 109.5°
  0 SO4-2 109.5°
  0 XeO4 109.5°
  1 NH3 107.8°
  1 PCl3 100°
  1 XeO3 108.1°
  1 CH3NH2 105.8 HNH
111 HNC
  1 NH2OH 107 HNH
103 HNO
  1 NH2NH2 107 HNH
109 HNN
  1 SOCl2 96 ClSCl
106 OSCl
  2 H2O 104.5°
  2 OF2 103°
  2 HOCl 103°
  2 CH3OH 108.9°
  2 NH2OH 103°
  3 HCl  
  3 Cl2  
5 0 PCl5 120, 180° 
  0 AsF5 120, 180° 
  0 SOF4 98, 124 OSF
  1 SF4 102, 173° 
  1 XeO2F2 105.6 OXeO
174.8 FXeF
  1 IO2F2 102 OXeO
179 FXeF
  2 BrF3 86, 172° 
  2 XeF3+ 89, 162° 
  2 XeOF2 92, 174° 
  3 I3 180°
  3 XeF2 180° 
6 0 SF6 90, 180°
  0 PF6 90, 180°
  0 XeO6-4 90, 180°
  1 BrF5 85, 170° 
  1 XeOF4 92, 176° 
  1 XeF5+ 80, 160° 
  2 XeF4 90, 180° 
  2 ICl4 90, 180° 
7 0 IF7 72, 90°
  1 IOF5-2 72, 92°
  2 XeF5 72°
*Steric number (SN) is atoms plus lone pairs

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Bond angles from National Institute of Standards and Technology.
This page created by George Lisensky, Beloit College.
Last modified January 23, 2026.
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