Q
QuestionChemistry

What is the electronic geometry and the molecular geometry of BF^3?
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Step 1
: Determine the electronic geometry of BF$_1$ using the Valence Shell Electron Pair Repulsion (VSEPR) theory.

The central atom, boron (B), in BF$_3$ has 3 valence electrons and each fluorine atom (F) contributes 1 valence electron, resulting in a total of 4 electron pairs around the central atom.
According to VSEPR theory, these electron pairs will arrange themselves in such a way as to minimize repulsion between them.

Step 2
: Determine the arrangement of electron pairs.

Since there are 4 electron pairs, they will arrange themselves in a tetrahedral shape. However, one of these positions is occupied by a lone pair of electrons on the boron atom, which does not participate in bonding.

Final Answer

The electronic geometry of BF$_1$ is tetrahedral due to the presence of 4 electron pairs around the central boron atom, and the molecular geometry is trigonal planar due to the arrangement of 3 fluorine atoms around the central boron atom.