For his cubane project he has been getting stuff sent off for NMR, obviously he can't send a hilariously sensitive energetic off for that. I'm genuinely unsure

For his cubane project he has been getting stuff sent off for NMR, obviously he can't send a hilariously sensitive energetic off for that. I'm genuinely unsure what other product would be made if you react isocyanogen tetrabromide with sodium azide, you could get a mix of azide and bromide on the isocyanogen, but that's super unlikely (bromide and azide double displacement is favourable reaction in this case, the bromine being more than happy to fuck off with the sodium) and you would get a distinct bromine cloud off any detonation or deflagration of the product.