Structural Defects in Few-Layer Graphene Nanostructures Synthesized by Self-propagating High-Temperature Synthesis

A quantitative method is proposed to determine of Stone-Wales defects for carbon nanostructures with sp2 hybridization of carbon atoms. The technique is based on the diene synthesis reaction (Diels-Alder reaction). The proposed method was used to determine Stone-Wales defects in the few-layer graphene (FLG) nanostructures synthesized by the self-propagating high-temperature synthesis (SHS) process, in reduced graphene oxide (rGO) synthesized based on the method of Hammers and in the single-walled carbon nanotubes (SWCNT) TUBAL trademark, Russia. Our research has shown that the structure of FLG is free of Stone-Wales defects, while the surface concentration of Stone-Wales defects in TUBAL carbon nanotubes is 1.1×10-5 mol/m2 and 3.6×10-5 mol/m2 for rGO.

FUNGICIDAL PROPERTIES OF N-(p-CARBOXYPHENYL)IMIDE-2,3-DICHLOROBICYCLO-[2.2.1]HEPT-5-EN-2,3-DICARBOXYLIC ACID

As a result of the interaction of substituted aminobenzoic acids and dichloromaleic anhydride in glacial acetic acid, various N-substituted imides of dichloromaleic acid have been obtained. Based on the diene synthesis of cyclopentadiene and N-substituted imides of dichloromaleic acid, N-(orthometa- and para-carboxyphenyl)imides of 2,3-dichlorocyclo-[2.2.1]hept-5-ene-2,3-dicarboxylic acid have been syn¬thesized. The obtained imides have been tested as a potential effective complex biologically active drug. The results of multiple tests have demonstrated that these compounds possess, simultangonsly, high fungicidal and bactericidal activity against cotton verticillus wilt. So, for a concentration of 0.1%, the obtained compounds almost completely destroy the fungus verticillum dahliae, as well as thionic iron-oxidizing and sulfate-reducing aerobic bacteria VKM V-458 and VKM V-1388

Synthesis and application of 3,4,7,8-tetrakis-exo-methylenecycloocta-1,5-diene as a versatile Diels–Alder diene: synthesis of V-shaped cyclooctatetraene fused acenes

Synthesis of 3,4,7,8-tetrakis-exo-methylenecycloocta-1,5-diene, has been reported. Diels-Alder reactions with this diene provides a shorter route for the synthesis of cyclooctatetraene fused with rigid aromatic wings.

Diene Synthesis by the Reductive Transposition of 1,2-Allenols

Monoalkyl diazene species are versatile intermediates that have enabled many useful synthetic transformations in complex chemical environments. Herein we report the reductive transposition of 1,2-allenols for the direct synthesis of dienes through an alkene walk process.