Problem: Draw a Lewis structure for (b) C2F4 

FREE Expert Solution

Step 1: Carbon (EN = 2.55) is less electronegative than fluorine (EN = 3.98) so carbon is the central atoms.


Step 2: The total number of valence electrons present in C2F4 is:


            Group             Valence Electrons

C         4A                   2 × 4 e8 e

F.         7A                   4 × 7 e28 e

Total:  36 valence e


Step 3: The bonding preferences of each element in the molecule is as follows:

Carbon: prefers to form 4 bonds

• Fluorine: prefers to form 1 bond (when not the central atom)


The two C atoms will go in the center while F is a terminal atom. 

Let’s first connect each atom while following their bonding preferences:


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Problem Details

Draw a Lewis structure for 

(b) C2F4 

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