Synthesis and structure of [(p-phenylenedimethylene) Bis [diphenylphosphine]]-Bis[(acetylacetonato) carbonylrhodium(I) and its reaction product with inorganic azides,azidocarbonylbis (triphenylphosphine) rhodium(I)

Journal of Structural Chemistry -     

Visible and ultra-violet absorption spectra of aqueous solutions of transition metal salts affected by a high-voltage pulse electric discharge

The effect of a high-voltage pulse electric discharge (HVPED) on the electron spectra of CuSO₄, Ni(NO₃)₂, NiCl₂, CoSO₄, and Co(NO₃)₂ aqueous solutions is investigated. It is found that the salt system activation by HVPED can change the configurations of electron shells of molecular ions. It is stated that the processes of post-activation structural relaxation of CuSO₄/H₂O solution are rather long-term. It is shown that the character of the HVPED effect on the electron spectra of solutions significantly depends on the solution composition and the intensity of interparticle interactions therein.     

A concise approach to the epidithiodiketopiperazine (ETP) core

A novel approach to the epidithiodiketopiperazine nucleus, incorporating two three-component reactions in a four-step synthetic sequence is reported.     

Structure of 1,3-Bis-(3-benzoxazolonyl)-2-hydroxypropane

We have studied the ¹H NMR spectrum of the synthesized 1,3-bis(3-benzoxazolonyl)-2-hydroxypropane. The nature of the splitting of the signals in the spectrum and computer modeling indicate that free rotation is possible about all non-ring bonds in the compounds.     

Use of a Split Microtron for Instrumental Gamma Activation Analysis

The potentials of a split microtron with an electron beam energy of up to 70 MeV for the gamma activation analysis of some natural samples were studied. Certified reference materials of bottom sediments—terrigenous clay (SDO-1), volcanic-terrigenous mud (SDO-2), and lime mud (SDO-3)—were used as model samples. The samples were irradiated with photons generated upon the deceleration of an electronic beam with an energy of 20–50 MeV. The beam was controlled by placing a gold foil before the test sample. Activation products of C, Cl, Na, Mg, Ti, Fe, Ca, Zr, Mn, Rb, Sr, Ni, Co, Y, As, Ba, Zn, Cs, Sc, Cr, and Ce were identified by gamma lines using a high-purity germanium detector.     

Optical properties of the HfO2 ? x N x and TiO2 ? x N x films prepared by ion beam sputtering

Optical characteristics of the HfO_{2 − x} N _x and TiO_{2 − x} N _x films obtained by reactive ion beam sputtering have been investigated by spectral ellipsometry. The chemical composition of the films was determined using X-ray photoelectron spectroscopy. The nitrogen content in the oxynitride films (determined by the N₂/O₂ ratio in the gas mixture during synthesis) reached ≈9 at % for TiO_{2 − x} N _x and ≈ 6 at % for HfO_{2 − x} N _x . It is found that the dispersion relations n(λ) and k(λ) for the TiO_{2 − x} N _x films change from those characteristic of titanium dioxide to those typical of titanium nitride with an increase in the nitrogen content from 0 to ≈9 at %. The optical parameters of the HfO_{2 − x} N _x films depend weakly on the nitrogen content in the range 0–6 at %. Original Russian Text ? V.V. Atuchin, V.N. Kruchinin, A.V. Kalinkin, V.Sh. Aliev, S.V. Rykhlitskiĭ, V.A. Shvets, E.V. Spesivtsev, 2009, published in Optika i Spektroskopiya, 2009, Vol. 106, No. 1, pp. 77–82.