Features of hydrolysis of phthalic acid chlorides

The experimentally measured rate constants of phthaloyl and terephthaloyl chlorides hydrolysis vary at the variable reagents ratio. This change obeys the Michaelis-Menten equation suggesting the intermediate formation by the reactants of the charge-transfer complex.     

Erratum: “Synthesis of New Hydrazones Based on Tetrathiacalix[4]arene in the 1,3-Alternate Conformation” [Russian Journal of Organic Chemistry 46 (8), 1162–1166 (2010)]

Russian Journal of Organic Chemistry -     

The role of carbon and metal in self-assembly of the iron-carbon system at various component ratios

The problem of self-assembly in a metal-carbon system under dynamic conditions (equilibrium and nonequilibrium) is considered using the iron-carbon system as an example. It is proved theoretically and experimentally that the ratio of the components of the system affects the possibility of carbon self-assembly with the formation of fractal iron structures and of metal self-assembly with the participation of polyhapto derivatives of iron and the formation of fullerene-like carbon structures.     

Direct Carbocyclizations of Benzoic Acids: Catalyst‐Controlled Synthesis of Cyclic Ketones and the Development of Tandem aHH (acyl Heck–Heck) Reactions

The formation of exo‐methylene indanones and indenones from simple ortho‐allyl benzoic acid derivatives has been developed. Selective formation of the indanone or indenone products in these reactions is controlled by choice of ancillary ligand. This new process has a low environmental footprint as the products are formed in high yields using low catalyst loadings, while the only stoichiometric chemical waste generated from the reactants in the transformation is acetic acid. The conversion of the active cyclization catalyst into the Hermman–Beller palladacycle was exploited in a one‐pot tandem acyl Heck–Heck (aHH) reaction, and utilized in the synthesis of donepezil.     

Phthalocyanines and related compounds: XLI. Synthesis of 9,10-diphenylanthracene-2,3-dicarboxylic acid derivatives

Derivatives of 9,10-diphenylanthracene-2,3-dicarboxylic acid were synthesized by the Diels-Alder reaction of 1,3-diphenylisobenzofuran with adducts of furan (or silvan) and the corresponding maleic (fumaric) acid derivative or with trans-cyclohex-4-ene-1,2-dicarbonitrile, followed by aromatization.     

Ring transformation of unsaturated N-bridgehead fused pyrimidin-4(3H)-ones: role of repulsive electrostatic nonbonded interaction

Thermal ring transformation ability of unsaturated N-bridgehead fused pyrimidin-4(3H)-ones A is governed by both the steric and the electrostatic interactions between the oxygen of the carbonyl group and the substituent in the peri position.     

Density measurements of non-crystalline materials under high pressure and high temperature

Abstract

We have developed a new method for density measurements by means of X-ray absorption under high pressure and high temperature using a multi-anvil apparatus combined with a synchrotron-radiation source. To overcome the effect of the variation of the sample thickness under pressure, a sapphire ball was put in the sample capsule as a calibrant of the thickness, and the intensity of the transmitted X-ray beam was measured as a function of the sample position. The densities of crystalline and liquid tellurium were measured up to 5 GPa and up to 700°C. Discontinuous changes in the density at the Te I-Te 11 transition and at the melting were clearly observed.     

Interaction of sodium fullerene derivatives with trimethylchlorosilane

Soluble dimer compounds of the general formula [C₆₀(Me ₃Si)_n]₂ (where n = 3, 5, 7, or 9 and M _e = CH₃) and a soluble monomer compound, C₆₀(Me ₃Si)₁₂, are synthesized by the reaction of the compound C₆₀Na_n(THF)_x (where n = 4, 6, 8, 10, or 12 and THF = tetrahydrofuran) with trimethylchlorosilane Me ₃SiCl. The compounds synthesized are identified using IR and NMR spectroscopy and mass spectrometry. An irreversible endothermic effect exhibited by the [C₆₀(Me ₃Si)₇]₂ compound in the temperature range 448–570 K is revealed by dynamic adiabatic calorimetry. From analyzing the experimental results, it becomes possible for the first time to demonstrate the structural flexibility of the fullerene in the following sequence of reactions: $\begin{array}{*{20}c} {C_{60} \xrightarrow[{ - 12C_{10} H_8 }]{{ + 12NaC_{10} H_8 }}C_{60} Na_{12} \xrightarrow[{ - 12NaCl}]{{ + excess Me_3 SiCl}}C_{60} (Me_3 Si)_{12} \xrightarrow[{ - 12Me_3 SiCl}]{{ + HCl(gas)}}[C_{60} H_n ]\xrightarrow[{ - 1/2nH_2 }]{{hv}}C_{60} } \\ {C_{60} \xrightarrow[{ - 8C_{10} H_8 }]{{ + 8NaC_{10} H_8 }}C_{60} Na_8 \xrightarrow[{ - 8NaCl}]{{ + excess Me_3 SiCl}}[C_{60} (Me_3 Si)_7 ]_2 \xrightarrow{{573K}}\begin{array}{*{20}c} {products of the} \\ {transformation of + } \\ {Me_3 Si groups} \\ \end{array} C_{60^ - } } \\ \end{array} $      

假蜜环菌的研究 Ⅰ.菌种的分离与鉴定

应用发光柳树朽木煎剂治疗胆囊炎,取得初步效果,这在医疗上还是首次,本文主要介绍菌种的分离和鉴定工作。 首先我们从发光柳树朽木上分离到一株发光真菌,菌丝体能发出浅蓝色的荧光,在人工培养基上生长时,此菌具有十分发达的不发光的根状菌索;形成的子实体丛生,不发光,菌盖浅蜜黄色,边缘薄,菌褶延生,菌柄杏仁黄色,略为扭曲,纤维质,无菌环,孢子印白色,孢子广椭圆形,光滑。经鉴定,这株发光真菌为假蜜环菌[Armillariella tabescens(Scop,ex Fr.)Sing]。     

Stoichiometric synthesis of fullerene compounds with lithium and sodium and analysis of their IR and EPR spectra

A modified method is proposed for preparing fullerene compounds with alkali metals in a solution. The compounds synthesized have the general formula Me _n C₆₀(THF)_x, where Me = Li or Na; n=1–4, 6, 8, or 12; and THF = tetrahydrofuran. The use of preliminarily synthesized additives MeC₁₀H₈ makes it possible to prepare fullerene compounds with an exact stoichiometric ratio between C ₆₀ ^n? and Me ⁺. The IR and EPR spectra of the compounds prepared are analyzed and compared with the spectra of their analogs available in the literature. The intramolecular modes T _u (1)-T _u (4) for the C ₆₀ ^n? anion are assigned. The splitting of the T _u (1) mode into a doublet at room temperature for Me _n C₆₀(THF)_x (n=1, 2, 4) compounds indicates that the fullerene anion has a distorted structure. An increase in the intensity of the T _u (2) mode, a noticeable shift of the T _u (4) mode toward the long-wavelength range, and an anomalous increase in the intensity of the latter mode for the Li₃C₆₀(THF)_x complex suggest that, in the fullerene anion, the coupling of vibrational modes occurs through the charge-phonon mechanism. The measured EPR spectra of lithium-and sodium-containing fullerene compounds are characteristic of C ₆₀ ^? anions. The g factors for these compounds are almost identical and do not depend on temperature. The g factor for the C ₆₀ ^n? anion depends on the nature of the metal and differs from the g factor for the C ₆₀ ^? anion.