Urea Salts with 1-Hydroxyethylidene Diphosphonic Acid

Russian Journal of General Chemistry - The reaction of urea with 1-hydroxyethylidene diphosphonic acid in the ratios of 1 : 1, 1 : 2, 1 : 3 was first studied. As a result of the reactions, the...     

Methylamine Derivatives with 1,2-Azole Fragments: Synthesis,Palladium Complexes,Catalysis of the Suzuki Reaction

Russian Journal of General Chemistry - New methylamine derivatives with 1,2-azole fragments (phenylisoxazole, p-tolylisoxazole, 2,5-dimethylphenylisoxazole and 4,5-dichloroisothiazole) and their...     

Computational and Experimental Method for Evaluating the Reactivity of Substituted Toluene Diamines and Azo Compounds in the Reactions of Amine and Anhydride Curing of Epoxy Resins

Russian Journal of Applied Chemistry - The optimization of the molecular structure of substituted 3,5-toluylene diamines was carried out by the ab initio method, which made it possible to calculate...     

Derivatives of Neopentanoic Acid Hydrazide as Reagents for Flotation Recovery of Non-Ferrous Metals

Russian Journal of Applied Chemistry - Five derivatives of neopentanoic acid hydrazide were studied and their physicochemical properties (solubility, protolytic equilibria, hydrolytic stability),...     

Comparison of Various Options for Designing the Direct Oxidation of Methane to Methanol

Russian Journal of Applied Chemistry - Various options for designing the direct oxidation of natural gas to methanol are considered: flow-through, with a distributed supply of the oxidizer along...     

Synthesis of Ultra-High Molecular Weight Polyolefins of Regular Structure in Octafluorobutane Medium

Russian Journal of Applied Chemistry - The suspension polymerization in octafluorobutane, initiated by Ziegler–Natta catalyst system, has been used to synthesize ultra-high molecular weight...     

Synthesis of Glycoluril using Urea Phosphate

Russian Journal of Organic Chemistry - Glycolurils are building blocks for the synthesis of cucurbiturils that are important host materials for several applications. Glycolurils are prepared...     

Synthesis of Diamantane Derivatives in Nitric Acid Media

Russian Journal of Organic Chemistry - 1-Mono- and 1,4-difunctional diamantane derivatives were synthesized by the reaction of diamantane with nitric acid or a HNO3–AcOH mixture followed by...     

The green synthesis of exceptional braided,helical carbon nanotubes and nanospiral platelets made directly from CO2

Helical carbon nanotubes currently cost ~15,000–19,000 USD/kg commercially and are ~10–15 times the price of straight carbon nanotubes of similar dimensions. They have not previously been made from the greenhouse gas CO₂ nor had new variants of the helical morphology been demonstrated. In this study, a novel, inexpensive electrosynthesis of these helical nanocarbon materials from CO₂ is presented. This material may be produced by molten carbon growth conditions that (1) maximize torsional stresses, such as those that may occur during rapid, nucleated carbon reduction, (2) enhance defects that cause formation of heptagonal, rather than the conventional hexagonal building blocks of graphene cylindrical walls, and (3) uniformly control those enhanced defects to repeatedly induce a uniform spiral conformation. These conditions are achieved with at least two of the following experimental conditions: (i) high electrolysis current density, (ii) sp³ defect-inducing agents, such as added oxide, and (iii) controlled concentration of iron added to the electrolyte or cathode. Here, it is shown with SEM, TEM, EDX, XRF, and Raman spectroscopy that a molten controlled electrolyte carbonate synthesis to induce defect formation, and a high rate of electrolysis (0.6 A/cm²) leads to a high yield of helical nanotubes, helical nanofibers, or helical nanoplatelet carbon morphologies.     

Essential Oil from the Aerial Part of Saponaria griffithiana and S. officinalis

Chemistry of Natural Compounds -