Neutral NO2 Lewis Structure

[summer*sun]

Im working on a lab right now where we are comparing the NO2 anion, NO2 cation and NO2 neutral. We have been asked to draw Lewis Structures for all three and the anion and cation are no problem but the neutral molecule no matter how hard I try there is no where to really fit the last electron, not nicely anyways.I would really appreciate being pointed in the right direction Thank you.

[John Cuthber]

Have you heard of N2O4?