Penta- and Hexa-aza-compounds

Penta- and Hexa-aza-compounds. 3,6-Dibenzyl-l,2,4,5-tetrazine (811) undergoes a complex reaction with methanolic potassium hydroxide, giving 3-benzyl-7-methoxy-6-phenylimidazo[l,2-6][l,2,4,5]tetrazine (812), whose structure has been elucidated by X-ray analysis.Carbon-13 n.m.r. spectroscopy has been used to investigate azido-tetrazole valence tautomerism for the systems (813) and (814) and for (815) (816) (817).  

Slouka and J. Kubata, Acta Unit). Palacki. Olomuc., Fac. Rerum Nat., 1978,57 (Chem. 17), p. 173 

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