Coles, S. J., Douheret, D., Hursthouse, M. B. and Kilburn, J. D.
2-(2-Pyridylimino)-2H-1,2,4-thia-diazolo 2,3-a pyridine
Acta Crystallographica Section C Crystal Structure Communications, 56, (6), . (doi:10.1107/S0108270100003152).
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The title compound, C11H8N4S, is found to have a symmetrical resonance structure in which both pyridyl-N atoms interact with the S atom forming hemi-bonds. This also results in the formation of a delocalized diimine region and disturbance of the aromaticity in the pyridyl rings.
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