Molecular Structure: VSEPR: Trigonal bipyramidbased shapes (AX_{n}E_{m}, n+m=5)
Arrangement of Electron Pairs  AX_{5}  AX_{4}E  AX_{3}E_{2}  AX_{2}E_{3} 






Trigonal Bipryramid 
Sawhorse 
Tshape 
Linear 

PCl_{5}  SF_{4}  ClF_{3}  I_{3}^{}  
All these geometries were theoretically found at the DFTB3LYP level of theory (631G(d,p) basis sets for light atoms and Stuttgart ECPs for the heaviest ones)
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