### Rule that Guarantees all Re-Arranged Lewis Structures?

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**Tue Jan 31, 2017 4:17 pm**For HW 9.25, to calculate the residual entropy of SO2F2, we need to draw out all the arrangements of the Lewis structure. I found that there are 6 different arrangements. After find the degeneracy, I used to S = Kb lnW.

Is there a method to be sure that I have drawn out every possible Lewis structure? After drawing out all 6 re-arrangements of the Lewis structure, I spent a little time wondering if there were more Lewis structures that I missed.

Is there a rule that relates molecular geometry and # of unique atoms to the total possible arrangements? When doing problems like these, does anyone have advice on how to know that you have drawn out all combinations?

Is there a method to be sure that I have drawn out every possible Lewis structure? After drawing out all 6 re-arrangements of the Lewis structure, I spent a little time wondering if there were more Lewis structures that I missed.

Is there a rule that relates molecular geometry and # of unique atoms to the total possible arrangements? When doing problems like these, does anyone have advice on how to know that you have drawn out all combinations?