Aromatic systems with 10π electrons derived from 3a-azapentalene. Part 37. Cyclization of the anion of azido-s-triazole into the anion of s-triazolo[2,3-d]tetrazole

1. Butler, R.N.
2. McEvoy, T.
3. Alcalde, E.
4. Claramunt, R.M.
5. Elguero, J.