High-Selective Catalyst Based on Intermetallic Rh1In1 Particles for Nitrobenzene Hydrogenation

Kinetics and Catalysis - The catalytic performance of a bimetallic RhIn/SiO2 catalyst was studied in the liquid-phase hydrogenation of nitrobenzene. The formation of intermetallic Rh1In1...     

Electrochemical Generation of Pyrazolyl-Pyridyl N-Heterocyclic Carbene Complexes of Nickel

Russian Journal of Electrochemistry - By methods of cyclic voltammetry and preparative electrolysis, the electrochemical properties of sterically hindered imidazolium salt...     

Banach limits: Invariance and functional characteristics

Banach limits invariant with respect to the Cesàro transform are studied. New functional characteristics of Banach limits are introduced and studied.     

Atomic force microscopy of the nanostructure of metals and alloys subjected to mechanical and thermal stresses

Low-carbon structural steels are an extremely important material used widely in all industries, e.g., in the manufacture of industrial pipelines and equipment operating at elevated temperatures and pressures, in contact with chemically aggressive environments. In this work, we study nanoscale changes in the substructure of structural steels that result from operational wearing out.     

A simple and convenient synthesis of 3-[5-(trifluoromethyl)-1,2,3-triazol-4-yl]cinnamic acids from 4-aryl-6-(trifluoromethyl)-2H-pyran-2-ones and sodium azide

4-Aryl-6-(trifluoromethyl)-2H-pyran-2-ones and ethyl 4-aryl-6-(trifluoromethyl)-2-oxo-2H-pyran-3-carboxylates react with sodium azide to produce highly functionalized CF₃-1,2,3-triazoles: 3-[5-(trifluoromethyl)-1,2,3-triazol-4-yl]cinnamic acids and monoethyl esters of [5-(trifluoromethyl)-1,2,3-triazol-4-yl]arylmethylidene malonic acids.     

Influence of the ratios of natural and butadiene-styrene rubbers on the viscosity of rubber blends and fragmentary mobility of macromolecules

The structural states of macromolecules of natural and butadiene-styrene rubbers in their blends were studied by evaluating the spin-lattice relaxation times of carbon nuclei. The relationship between the viscosity of rubber blends and fragmentary mobility of macromolecules was examined.

     

On independence numbers of distance graphs with vertices in {-1,0,1}<Superscript><Emphasis Type="Italic">n</Emphasis></Superscript>: estimates,conjectures, and applications to the Nelson–Erdős–Hadwiger problem and the Borsuk problem

The paper states and studies a problem that is closely related to the problems mentioned in the title.     

A Novel and Simple Synthesis of 2-(Trifluoromethyl)-4H-thiochromen-4-ones

Abstract

Alkyl 2-mercaptophenyl ketones react with trifluoroacetic anhydride in the presence of triethylamine to give 2-(trifluoromethyl)-4H-thiochromen-4-ones, which are transformed into the corresponding pyrazoles by treatment with hydrazine hydrate and into 1,1-dioxides by oxidation with H₂O₂ in AcOH.