A spectroscopic investigation of the conformational equilibrium of methyl cyclohexane

The vibrational spectra of the axial and equatorial conformations of methyl cyclohexane were computed. The temperature variation of the relative intensity of the 607 (axial) and 547 (equatorial) cm^–1 IR absorption bands were were used to determine H for the liquid and vapor. The IR spectrum at the liquid-vapor transition was investigated.In conclusion, the authors express their sincere gratitude to Z. I. Kaganov for his assistance in the computations and to V. T. Alekxanyan for his useful comments.     

Influence of thermal effects on hydrodynamic stability of a polymerization front

Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, No. 2, pp. 81–89, March–April, 1992.     

Structure of the undecahydrodecaborate anion B10H

The crystal structures of [Ph ₃PCH₂ Naph]B₁₀H₁₁(I) and [Ph ₃PEt]₂B₁₀H₁₀ (II) are studied (110 K and room temperature, R = 0.0673 and 0.0609 for 4176 and 953 observed reflections in I and II, respectively). It is unambiguously determined that protonation of the B₁₀H ₁₀ ²⁻ anion proceeds at one of the faces of the apical belt and results mainly in a significant lengthening of the edges of the centered face [B_e-B_e, 1.948(4) Å; B_a-B_e, 1.770(5) Å and 1.787(5) Å]. __________ Translated from Kristallografiya, Vol. 49, No. 5, 2004, pp. 855–859. Original Russian Text Copyright ? 2004 by Polyakova, Mustyatsa, Zhizhin, Kuznetsov.     

[Co(solv)<Subscript>6</Subscript>][B<Subscript>10</Subscript>H<Subscript>10</Subscript>] (solv = DMF and DMSO) for low-temperature synthesis of borides

The synthesis and structure of complexes [Co(solv)₆][B₁₀H₁₀] (solv = DMF and DMSO) have been reported. Both complexes have been prepared in a high yield by the reaction between cobalt(II) salts and closo-decaborates Cat₂[B₁₀H₁₀] in the corresponding solvent. The complexes have been characterized by elemental analysis, IR and UV spectroscopy, X-ray powder diffraction, and X-ray crystallography. The thermal properties of the compounds have been studied in the temperature range 20–600°C under argon. The conditions to form cobalt borides have been determined based on the results of thermal analysis, subsequent annealing of the complexes in various conditions, and analysis of IR spectra of the resulting thermolysis products.     

Reaction of the <Emphasis Type="Italic">closo</Emphasis>-decaborate anion B<Subscript>10</Subscript>H<Stack><Subscript>10</Subscript><Superscript>2−</Superscript></Stack> with dichloroethane in the presence of hydrogen halides

The reactions of the closo-decaborate anion with hydrogen halides and dichloroethane have been studied. Irrespective of the hydrogen halide used (HCl, HBr, HI), chlorination to give mono-, di-, and trihalosubstituted products is the major process. The product ratio depends on the hydrogen halide used and on the synthesis temperature and time. The products have been identified by ¹¹B NMR, IR, and ESI mass spectra. The structure of (Ph₃(NaphCH₂)P)₂B₁₀H₈Cl₂ has been studied by X-ray diffraction. The geometry distortion of the closo-decaborate core found in the chlorinated derivatives is retained on further chemical transformations of the compound.     

Nickel Adsorption on Bi2Se3 Surface

Physics of the Solid State - The effect of the physical adsorption of nickel on a surface of a topological Bi2Se3 insulator on the electronic structure has been studied. The influence of the...     

Spin polarization of quantum-well and interface states of ultrathin films of Bi on w(110) with Ag interlayers

The electronic and spin structure of quantum-well and interface states, formed in the system, consisting of bilayer of Bi on 1 ML Ag/W(110) was investigated by angle- and spin- resolved photoelectron spectroscopy. It has been shown that interface states are formed in local surface-projected gap of W(110) and are characterized by spin polarization and spin-orbit splitting, corresponding to surface resonances with high density spin-polarized states near Fermi edge.