Urea/Thiourea‐Anion Host Lattices, Stabilization of Labile Species, and Designed Construction of Rosette Ribbon and Layers

N—H...S and C—H...S hydrogen bonds in two tetraalkylammonium dithiobiurea(1–) inclusion compounds

“…In the systematic research of Mak et al (2010), the thiourea anion-tetraalkylammonium inclusion compounds show varied structures, such as double-channel structures, undulating layer structures, sandwich-like structures, and so on. But in these compounds, the host thiourea molecules are all neutral and ancillary anions need to be added to compensate the charge of the tetraalkylammonium cation.…”

“…The hydrates of tetraalkylammonium salts are another typical class of inclusion compounds, in which the anions and water molecules generate anionic host lattices to contain the hydrophobic tetraalkylammonium cations. By introducing thiourea and urea into the tetraalkylammonium system, Mak & Li (1998) and Mak et al (2010) discovered a new class of thiourea/urea anion inclusion compounds and synthesized over 200 novel examples. Dithiobiurea is an important derivative of thiourea and its biological activities have received much attention (Adediji, 2013), but tetraalkylammonium inclusion compounds based on dithiobiurea have not yet been reported.…”

Hydrogen-Bonded Supramolecular Architecture by Solvomorphism of Hexahydroxytriptindane: From a Rosette Network to a Rod Structure

“…Its potential applications are rich in various realms, including supramolecular assembly 1−7 and crystal engineering. 8 Over the past few decades, chemists have employed symmetrical cations and anions as building blocks to assemble rosette layers. 9−11 Another commonly used strategy is the use of heterocyclic molecules equipped with suitable hydrogen-bonded arrays for a preorganized assembly.…”

Electronic features and hydrogen bonding capacity of the sulfur acceptor in thioureido-based compounds. Part 2. Further insight by theoretical charge density study

“…Although a number of studies indicate the significance of DAHÁ Á ÁS interactions for structure and function of biological systems [1][2][3][4][5][6][7][8][9][10][11] as well as inorganic materials [12][13][14][15][16] the acceptor abilities of the S atom are not sufficiently explored. In general, due to a low electronegativity, the sulfur is rarely considered as a relevant hydrogen bonding acceptor.…”