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1. The molecules PF5 and AsF5 exist, but the analogous molecule NF5 does not. Why not?...

1. The molecules PF5 and AsF5 exist, but the analogous molecule NF5 does not. Why not?


2. For the molecule N2O there are five unique Lewis structures that satisfy the octet rule. Three have the N-N-O bond skeleton and two would have the N-O-N skeleton.

a) Draw the five UNIQUE Lewis structures.

b) By considering the formal charges, can you suggest which structures could be eliminated due to low stability (i.e. have like charges next to each other).


c) Which structures have the smallest number and value of formal charges?

d) Because oxygen is more electronegative than nitrogen, it is more likely to have a negative formal charge. Which structure would then be the best description of N2O?

e) Are the structures that have the N-O-N bond skeleton resonance forms of the structures with N-N-O skeleton? Explain.

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