I'm hoping someone can shed some light on this question for me:
Consider the molecule diazomethane (CH2N2). Two possible Lewis Structures:H
Determine which one is the more favourable structure using bond dissociation energies.
Now, when I work out the bond dissociation energies, the first structure has a total of 1857KJ/mol (H-C=414;C-N=891;N-N=163;N-H=389) and the second structure has a total of 1861KJ/mol (2(H-C)=828;C-N=615;N-N=418). I would say that the first structure is the more favourable structure because it is the lower energy tautomer, but the answer in my book says the second structure is favourable. What am I doing wrong here?