Synthesis of α-myrcenol acetate and propionate from isobutenylcarbinol

A synthesis of -myrcenol acetate and propionate was carried out by a controled combination of suitable isobutenylcarbinol derivatives according to the Wurtz reaction.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 591–594, March, 1990.     

Single-crystal structure of vanadium-doped La2Mo2O9

A high-precision X-ray diffraction study of single crystals of two compositions—La₂Mo_1.78V_0.22O_8.89 and La₂Mo_1.64V_0.36O_8.82—was performed. In the vanadium-doped compounds, as in the structure of the metastable β_ms phase of pure La₂Mo₂O₉, the La and Mo atoms and one of the three oxygen atoms are displaced from the threefold axis, on which they are located in the high-temperature β phase. The structure contains two partially occupied oxygen sites. It was shown that molybdenum atoms are partially replaced by vanadium atoms, which are not involved in the disordering, are located on the threefold axis, and are shifted toward one of the oxygen atoms. This is consistent with the temperature-induced changes in the structure of La₂Mo₂O₉ and the changes in the properties of these crystals caused by the introduction of vanadium atoms into the structure.     

Thermal expansion and mean-square displacements of metal and boron atoms in dysprosium diboride DyB<Subscript>2</Subscript>

Dysprosium diboride is investigated by x-ray diffraction in the temperature range 4.2–300 K. The data obtained are used to determine the (301) and (104) interplanar distances and the corresponding intensities of the x-ray reflections. The calculated linear and bulk thermal expansion coefficients of the DyB₂ compound are characterized by a pronounced anomaly in the temperature range corresponding to the magnetic transformation. The estimates of the mean-square displacements for the Dy and B atoms (calculated from the reflection intensities) are satisfactorily described by the Debye dependences with the characteristic temperatures θ_Dy = 210 K and θ_B = 800 K.     

Principles of the Construction of Polymer Structures,Heteronuclear (13C, 15N) CP-MAS NMR,and Thermal Behavior of Heteroleptic Bismuth(III) Complexes of the General Composition [Bi(S2CNR2)2X] (X = NO3, Cl)

Russian Journal of Coordination Chemistry - The crystalline heteroleptic bismuth(III) complexes, [Bi{S2CN(iso-C4H9)2}2(NO3)] (I) and [Bi{S2CN(C3H7)2}2Cl] (II), are isolated in preparative yields....     

Preparation of Poly(methyl methacrylate) Nanoparticles 15–50 nm in Diameter from Submicrometer-Sized Latex Particles

Russian Journal of Applied Chemistry - A procedure was developed for preparing poly(methyl methacrylate) nanoparticles of 15–50 nm size from coarser (200–300 nm) polymer latex particles...     

Synthesis and Biological Activity of 2-Aryl-4-hydroxy-4-methyl-6-oxocyclohexane-1,3-dicarboxamides

Russian Journal of General Chemistry - The reaction of unsubstituted acetoacetamide with aromatic aldehydes in ethanol in the presence of piperidine gave...     

Possibilities of X-Ray Absorption Spectroscopy in the Total External Reflection Geometry for Studying Protein Films on Liquids

Crystallography Reports - XANES spectra of protein films (hemoglobin and alkaline phosphatase) formed on the surface of a liquid subphase in a Langmuir trough have been obtained experimentally. The...     

Chitosan–Tripolyphosphate Nanoparticles: Synthesis by the Ionic Gelation Method,Properties, and Biological Activity

Russian Journal of General Chemistry - Nanoparticles with an average size of ~100 nm were obtained by ionic gelation of chitosan (M 6.5×103 and 60×103 Da) in the presence of...     

Distinct effect of xenobiotics on the metal‐binding properties of protein molecules

The X‐ray standing‐wave method was applied to study the elemental composition and molecular organization of ordered protein films of alkaline phosphatase exposed to different xenobiotics (drug compounds, lead). Binding of metal ions from triply distilled water to protein molecules has been experimentally observed. Definite differences in the arrangement of impurity metal ions in the films have been established. The considerable enhancement of protein–metal interactions is attributed to partial rearrangement of the protein native structure, induced by xenobiotics.