Acta Cryst. (2005). E61, o1337-o1339  [ doi:10.1107/S1600536805010974 ]

4-Morpholinyl{2-[1-(2-pyridinyl)ethylidene]diazan-2-iumylidene}methanethiolate

H.-K. Fun, S. Chantrapromma, V. Suni, A. Sreekanth, S. Sivakumar and M. R. P. Kurup

Abstract: The title compound, C₁₂H₁₆N₄OS, is zwitterionic and exists in the EZ configuration of thiosemicarbazones. The thiocarbonyl S atom and coordinating pyridyl N atom are aligned cis to each other, avoiding the possibility of a structural reorientation upon coordination. Two crystallographically independent molecules, A and B, are observed in the asymmetric unit, with the morpholyl ring adopting a chair conformation in both molecules. N-HN and N-HS intramolecular hydrogen bonds are observed in the molecular structure, generating four rings of motif R₁²(5). There is zigzag packing in the unit cell, involving both intra- and intermolecular hydrogen-bonding interactions.

Online 16 April 2005

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