thiourea has been researched along with rubeanic-acid* in 5 studies
5 other study(ies) available for thiourea and rubeanic-acid
| Article | Year |
|---|---|
From 1D strands to extended molecular assemblies in the binary compounds of dithiooxamide and dithiobiurea with crown ethers.
The hydrogen-bonding networks for seven new binary compounds of dithiooxamide, (NH2CS)2 (dtox) and dithiobiurea (NH2CSNH)2 (dtur) with crown ethers, 18-crown-6 (18C6), 15-crown-5 (15C5), 12-crown-4 (12C4), cis-syn-cis-(DCHA), and cis-anti-cis-(DCHB) isomers of dicyclohexyl-18 -crown-6 are discussed. (15C5.dtox), (18C6.dtur) and (DCHB.dtur) afford one-dimensional hydrogen-bonded polymeric arrays where the components alternate. In (DCHA.2dtox) and (DCHB.2dtox) the similar hydrogen-bonded chains are further interlinked via dtox molecules to generate layered motifs. In (15C5.2dtur) the dtur molecules are self-assembled into layers via N-H...S hydrogen bonds. 15C5 spacers link adjacent layers into a three-dimensional network. In (12C4.dtur) the dtur molecules are arranged in chains. These chains alternate with the crown molecules attached to them through N-H...O hydrogen bonds in such a way that each 12C4 appears to be linked with four dtur molecules and vice versa thus providing a three-dimensional grid. Topics: Crown Ethers; Crystallography, X-Ray; Hydrogen Bonding; Isomerism; Molecular Structure; Thioamides; Thiourea | 2003 |
Competitive sorption of platinum and palladium on chitosan derivatives.
Glutaraldehyde-cross-linked chitosan (GCC), thiourea derivative of chitosan (TGC) and rubeanic acid derivative of chitosan (RADC) have previously been shown to be very efficient at removing platinum and palladium from single component dilute acidic solutions. This study examines the competitive sorption of these metal anions in bi-component mixtures for GCC, TGC and RADC. Palladium sorption is less sensitive to the presence of platinum than the reverse: the maximum sorption capacity decreases less for palladium than for platinum in the presence of the competitor anion (the metals being in their chloro-metal forms). Moreover, the Langmuir-shape of the sorption isotherm for palladium is unaffected (with the usual plateau reached at low residual palladium), while in the case of platinum sorption, the isotherms exhibit a significant decrease of the sorption capacity at high residual platinum concentration which increases with increasing concentrations of palladium. RADC is more selective for palladium over platinum than the other chitosan derivatives. A preliminary study of the competitive sorption kinetics in both batch and fixed bed systems is presented for RADC and confirms the higher affinity of the sorbent for palladium than for platinum. Topics: Adsorption; Binding, Competitive; Chitin; Chitosan; Cross-Linking Reagents; Glutaral; Hydrogen-Ion Concentration; Kinetics; Palladium; Platinum; Thioamides; Thiourea | 2001 |
[H2-antihistaminics, VII: Synthesis and H2-antihistaminic activity of N,N'-substituted thioureas, cyanoguanidines and dithiooxamides (author's transl)].
Topics: Amides; Animals; Guanidines; Guinea Pigs; Histamine H2 Antagonists; In Vitro Techniques; Nitriles; Thioamides; Thiourea | 1981 |
Studies on substituted dithiooxamides, diphosphopyridine necleotide-linked dehydrogenase inhibitors. I. General toxicity and site of action.
Topics: Enzyme Inhibitors; Humans; Oxidoreductases; Thioamides; Thiourea | 1957 |
Studies on substituted dithiooxamides, diphosphopyridine nucleotide-linked dehydrogenase inhibitors. II. Mechanism of action.
Topics: Enzyme Inhibitors; NAD; Oxidoreductases; Thioamides; Thiourea | 1957 |