G. Labbe et al., SYNTHESIS OF 6A-LAMBDA(4)-THIA-1,2,3,5,6-PENTAAZAPENTALENES, Journal of the Chemical Society. Perkin transactions. I, (20), 1994, pp. 2895-2897
The title compounds have been obtained from 5-amino-1,2,3-thiadiazole
6 by methylation and reaction with arenediazonium tetrafluoroborates;
their C-13 NMR data and X-ray analysis are discussed in terms of two n
on-equivalent resonance contributors 11A and 11B.