Posted by Anonymous on Thursday, February 12, 2009 at 6:19pm.
I don't think that NO2 would be likely to accept a "single electron" but I don't know that. If we change it to a nitrite ion (NO2^-), then we can draw a legitimate Lewis electron dot structure. The one I drew for myself (since we can't do these on the boards) is O-N=O with six electrons around the left O, four more electrons around the right O which gives the right O an octet, the left O and octet, and N an octet with a -1 formal charge on the left O. But with an octet for N, there is no reason for adding electrons to it; i.e., an octet is sufficient AND more electrons than an octet can't be accommodated by N. So I don't see NO2 or NO2^- being a Lewis acid but organic puzzles me anyway.
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