Janczak Jan, Perpétuo Genivaldo Julio
Institute of Low Temperatures and Structures Research, Polish Academy of Sciences, PO Box 1410, 50-950 Wrocław, Poland.
Acta Crystallogr C. 2008 Jun;64(Pt 6):o330-4. doi: 10.1107/S0108270108013504. Epub 2008 May 21.
Crystals of the title compounds, namely 1-(diaminomethylene)thiouron-1-ium perchlorate, C2H7N4S+.ClO4-, 1-(diaminomethylene)thiouron-1-ium hydrogen sulfate, C2H7N4S+.HSO4-, 1-(diaminomethylene)thiouron-1-ium dihydrogen phosphate, C2H7N4S+.H2PO4-, and its isomorphic relative 1-(diaminomethylene)thiouron-1-ium dihydrogen arsenate, C2H7N4S+.H2AsO4-, are built up from a nonplanar 1-(diaminomethylene)thiouron-1-ium cation and the respective anion linked together via N-H...O hydrogen bonds. Both arms of the cation are planar, but they are twisted with respect to one another around the central N atom. Ionic and extensive hydrogen-bonding interactions join oppositely charged units into layers in the perchlorate, double layers in the hydrogen sulfate, and a three-dimensional network in the dihydrogen phosphate and dihydrogen arsenate salts. This work demonstrates the usefulness of 1-(diaminomethylene)thiourea in crystal engineering for the formation of supramolecular networks with acids.
标题化合物，即高氯酸1-(二氨基亚甲基)硫脲鎓（C2H7N4S+.ClO4-）、硫酸氢1-(二氨基亚甲基)硫脲鎓（C2H7N4S+.HSO4-）、磷酸二氢1-(二氨基亚甲基)硫脲鎓（C2H7N4S+.H2PO4-）及其同构物砷酸二氢1-(二氨基亚甲基)硫脲鎓（C2H7N4S+.H2AsO4-）的晶体，由一个非平面的1-(二氨基亚甲基)硫脲鎓阳离子和通过N-H...O氢键连接在一起的相应阴离子构成。阳离子的两条臂是平面的，但它们围绕中心N原子相互扭曲。离子和广泛的氢键相互作用将带相反电荷的单元连接成高氯酸盐中的层、硫酸氢盐中的双层以及磷酸二氢盐和砷酸二氢盐中的三维网络。这项工作证明了1-(二氨基亚甲基)硫脲在晶体工程中用于与酸形成超分子网络的实用性。
