Crystal structural determination of ring-chain tautomers of 1,2,3,4-tetrahydro-s-tetrazines.
1,2,3,4-Tetrahydro-1-methyl-3-(p-bromophenyl)-4,6-diphenyl-s-tetrazine (3a), exhibiting ring .dblharw. chain tautomerism in solns, exists as the ring tautomer in the solid phase, as proved by x-ray crystal structure detn. However, the 6-acetyl analog 3b acquires the chain form in the cryst. state. Crystallog. data and at. coordinates are given.
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