Shock waves in gas flows with nanoparticles

Journal of Thermal Analysis and Calorimetry - The paper focuses on the analytical analysis of the propagation of a normal shock wave in an adiabatic gas flow with nanoparticles. A modified...     

Synthesis and reactions of heterocyclic compounds

5-Azido-2-methylbenzthiazole, 6-azido-1, 2-dimethyl-, and 5-azido-2-methyl-1-phenylbenzimidazoles were prepared. By the reactions of these azides with alkyl halides the quaternary slats based on the cyanine dyes were obtained.     

Bromo derivatives of 4-phenyl-2,3-dihydro-1h-1,5-benzodiazepin-2-one

Monobromo and dibromo derivatives were synthesized by bromination of 4-phenyl-2,3-dihydro-1H-1,5-benzodiazepin-2-one with bromine under various conditions and with N-bromosuccinimide in CCl₄. 7-Bromo- and 8-bromo-4-phenyl-2,3-dihydro-1H-1,5-benzodiazepin-2-ones were obtained by condensation of 4-bromo-o-phenylenediamine with benzoylacetic ester in refluxing xylene. The UV and PMR spectra of the products are discussed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 411–415, March, 1978.     

Indole derivatives

Depending on the pH, 1-(1-indolinyl)-3-aryltriazenes (I) or 5-arylazoindolines (II) are formed in the reaction of indoline with aryldiazonium salts. In acid media, I are rearranged to II. The dehydrogenation of I or II with chloranil gives 5-arylazoindoles.See [1] for communication LXXVI.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 648–651, May, 1972.     

Indole derivatives

2-(1-Octen-1-yl)indole was obtained by the Wittig reaction, and the product was used to prepare ethyl 7-[2-(1-octen-1-yl)-3-indolyl]-7-ketoheptanoate and the acid itself, which are possible model compounds in the synthesis of indole analogs of prostaglandins.     

Thermochemistry of C60 and C70 fullerene solvates

In an effort to improve understanding of dissolution behaviour of fullerenes and their simple chemical derivatives the binary systems of C₆₀, C₇₀ and the piperazine monoadduct of [60] fullerene C₆₀ N₂C₄H₈ with a series of aromatic solvents have been studied by means of DSC. In certain systems solid solvates have been found to be the thermodynamically stable phases relative to saturated solution at room temperature. Identified solid solvates were characterized by their compositions, temperatures and enthalpies of incongruent melting transitions. The regularities in thermodynamic stability of the solvated crystals have been discussed along with dissolution properties of fullerenes and the derivative. Certain correlations have been observed.     

Interpolymer complexes of a new type

A new type of three-component interpolymer complexes (3IPCM) formed by two similarly charged polyelectrolytes and an oppositely charged low molar mass compound was studied by DSC, NMR and X-ray methods. The low molar mass monobasic compounds in these complexes act as mediators. This type of complexes differs from earlier-obtained 3IPCM, which contained a dibasic low molar mass mediator.The present 3IPCM were obtained from two polymers (polyacrylic acid and sodium polyphosphate) and bases such as 4-vinylpyridine and 2-methyl-5-vinylpyridine.The authors express their acknowledgement to the Russian Science Foundation for sponsoring research projects 93-03-5650 and 93-03-18682.     

Heat Transfer in Porous Microchannels with Second-Order Slipping Boundary Conditions

Transport in Porous Media - The paper presents results of a study of forced convection in a vertical flat and circular microchannels incorporating porous medium under slip boundary conditions of...