Shape or Structure of BF3 - Trigonal planar geometry
Boron trifluoride, BF3. Its Lewis structure shown that the central atom B has three bonding electron pairs and no unshared electrons.
VSEPR theory says that the three bonding electron pairs will be as far apart as possible.
This can be so if these electron pairs are directed to the corners of an equilateral triangle.
Thus VSEPR model of BF3 molecule has three F atoms at the corners of the triangle with B atom at its centre.
All the four atoms (three F and one B) lie in the same plane.
Therefore, the shape of such a molecule is called trigonal planar.
The bond angle is 120º.
