Acta Crystallographica Section C

Crystal Structure Communications

Volume 65, Part 5 (May 2009)

organic compounds

Acta Cryst. (2009). C65, o191-o194 [ doi:10.1107/S0108270109010919 ]

Products of the interaction of (1-diaminomethylene)thiourea with hydrofluoric acid

M. Holynska and M. Kubiak

Abstract: The salts 1-(diaminomethylene)thiouron-1-ium hydrogen difluoride, C₂H₇N₄S⁺·HF₂^-, (I), and bis[1-(diaminomethylene)thiouron-1-ium] hexafluoridosilicate, 2C₂H₇N₄S⁺·SiF₆^2-, (II), have both been obtained from the reaction of (1-diaminomethylene)thiourea (HATU) with hydrofluoric acid. Both compounds contain extensive networks of N-HF hydrogen bonds. The hydrogen difluoride salt contains four independent asymmetric [HF₂]^- anions. In the hexafluoridosilicate salt, the centrosymmetric [SiF₆]^2- anion is distorted, although this distortion is not clearly correlated with the N-HF hydrogen-bonding network.

Formula: C₂H₇N₄S⁺·HF₂^- and 2C₂H₇N₄S⁺·SiF₆^2-


	Structure factor file (CIF format) (365.0 kbytes) [ doi:10.1107/S0108270109010919/gd3281Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (90.4 kbytes) [ doi:10.1107/S0108270109010919/gd3281IIsup3.hkl ] Contains datablock II

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