Problem: Determine the molecular geometry of SeF4.

FREE Expert Solution

The possible electron pair and molecular geometries are:



Draw the Lewis structure for SeF4


Step 1: Selenium (EN = 2.4) is less electronegative than fluorine (EN = 4) so Se is the central atom.


Step 2: The total number of valence electrons present in the molecule is:


            Group             Valence Electrons

Se        6A                   1 × 6 e6 e

F          7A                   4 × 7 e28 e

Total:  34 valence e


Step 3: Note that halogens, when not the central atom, forms only 1 bond

The Lewis structure of SeF4 is:

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Problem Details

Determine the molecular geometry of SeF4.

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