HN₃ + NCl₃ -> N(N₃)₃ + HCl (not balanced)

would be impossible. I ran a fairly high-level calculation (HF/6-311+G**) on N(N₃)₃ and found that it seems to hold together. HOWEVER, it does not appear to be highly stable; the calculation has serious problems finishing and, in fact, the only good, stable structures I got had between 8 and 12 imaginary vibrational modes! (An imaginary vibrational mode is one which corresponds to a way for a molecule to fall apart.)

Even if you could get the stuff to form, I'd be shocked if it held together for long. Nitrogen is normally added to compounds to make them more explosive, and azides (compounds of N₃) are explosive anyhow. So IF your reaction worked, it would probably blow up in your face as the energy released by the reaction went into transforming N₁₀ into 5N₂ + energy.

Dan Berger
MadSci Administrator