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VSEPR

theoretical model used in chemistry

Contents

VSEPR GeometriesEdit

Valence shell electron pair repulsion (VSEPR) theory (1957) is a model in chemistry, which is used for predicting the shapes of individual molecules, based upon their extent of electron-pair electrostatic repulsion, determined using steric numbers.

2DEdit

Steric
No.
Basic Geometry
0 lone pair
1 lone pair 2 lone pairs 3 lone pairs 4 lone pairs
1  
linear
       
2  
linear
 
linear
     
3  
trigonal planar
 
bent / angular
 
linear
   
4  
tetrahedral
 
trigonal pyramid
 
bent / angular
 
linear
 
5  
trigonal bipyramid
 
sawhorse / seesaw
 
t-shape
 
linear
 
6  
octahedral
 
square pyramid
 
square planar
   
7  
pentagonal bipyramidal
 
pentagonal pyramidal
     


3DEdit

Steric
No.
Basic Geometry
0 lone pair
1 lone pair 2 lone pairs 3 lone pairs 4 lone pairs
1  
linear
       
2  
linear
 
linear
     
3  
trigonal planar
 
bent / angular
 
linear
   
4  
tetrahedral
 
trigonal pyramid
 
bent / angular
 
linear
 
5  
trigonal bipyramid
 
sawhorse / seesaw
 
t-shape
 
linear
 
6  
octahedral
 
square pyramid
 
square planar
   
7  
pentagonal bipyramidal
 
pentagonal pyramidal