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Drones and Possibilities of Their Using
This article shows the drones and possibilities of their using. First there was discussed construction of the drone, which the most important elements are frame, propellers, engine, system of powerExpand
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The use of Alcohols and their Compounds as Biofuel and Gasoline Blends
This article presents the quality requirements for bioethanol using as a biofuel or a gasoline blend. There were discussed the blends of gasoline with bioethanol. Then, there was characterized theExpand
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A synthesis of linear oligoheterocycles based on the substituted pyrimidines are described. The desired compounds have been accomplished by the variation of the original Pinner synthesis in which theExpand
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Practical synthesis of bis-substituted tetrazines with two pendant 2-pyrrolyl or 2-thienyl groups, precursors of new conjugated polymers
Abstract Novel linear oligoheterocycles based on substituted tetrazines are described. The desired compounds have been accomplished by a variation of the original Pinner [Ann. Chem., 297 (1897) 221]Expand
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NMR spectra, GIAO and charge density calculations of five‐membered aromatic heterocycles
The B3LYP/6‐31 + G(d) molecular geometry optimized structures of 17 five‐membered heterocycles were employed together with the gauge including atomic orbitals (GIAO) density functional theory (DFT)Expand
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Theoretical studies on the mechanism of C-P bond cleavage of a model alpha-aminophosphonate in acidic condition.
Various reaction paths of the P-C bond cleavage of alpha-aminophosphonates in acidic media, resulting in the derivatives of phosphonic acid, has been investigated using density functional level ofExpand
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Theoretical studies of symmetric five-membered heterocycle derivatives of carbazole and fluorene: precursors of conducting polymers.
Structures, electron ionization and excitation energies, and electron density distribution are studied for carbazole and fluorene derivatives substituted symmetrically by thiophene,Expand
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Structural elucidation of nitro‐substituted five‐membered aromatic heterocycles utilizing GIAO DFT calculations
The GIAO (Gauge Including Atomic Orbitals) DFT (Density Functional Theory) method is applied at the B3LYP/6–31+G(d,p)//B3LYP/6–31+G(d), B3LYP/6–311++G(d,p)//B3LYP/6–31+G(d), B3LYP/6–311+GExpand
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gNMR simulated 1H and proton-coupled 13C NMR spectra of substituted 3-nitropyridines. GIAO/DFT calculated values of proton and carbon chemical shifts and coupling constants
Abstract The magnitude of one bond and long-range coupling constants in 3-nitropyridine 1 and its derivatives 2–16 were determined from the proton-coupled 13C NMR spectra in CDCl3. The GIAO/DFTExpand
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Triazole-oligomers by 1,3-dipolar cycloaddition
A variety of triazole-oligomers have been prepared under microwave and conventional conditions from novel alkynes and azides.
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