Quiz: VSEPR

Draw the Lewis dot structure and predict electronic and molecular structure, bond angle of the following:

Molecule Lewis Dot Structure Electronic geometry

Molecular Geometry

Bond angle

BH3 H−B−H │ H

(remember Boron is an exceptional element, it needs 6 e’s in outermost shell

Trigonal planar

Trigonal planar

120

MgCO3

¨ ¨[Mg]2+ [:O− C==O ]2-

¨ │ ¨ : O :

¨

Trigonal planar

Trigonal planar

120

SO2 ¨ : S==O: │ : O:

¨

Trigonal planar

angular 120

H3O+

¨ [ H−O−H ]+

│ H

Tetrahedral Trigonal pyramidal

109.5

CH2O H −C==O │ H

Trigonal planar

Trigonal planar

120