Publications by authors named "Alexander I Gubanov"
Article Synopsis
- The crystalline zirconium tungstate (ZrWO) exhibits catalytic properties particularly suited for liquid-phase selective oxidation of various organic substrates using aqueous hydrogen peroxide as a green oxidant.
- Characterization techniques like N adsorption, PXRD, and IR spectroscopy indicated the presence of Brønsted acidic and basic sites on ZrWO's surface, enhancing its catalytic activity.
- The catalyst effectively facilitates reactions such as epoxidation of alkenes, oxidation of thioethers and alcohols, and regenerates well without losing activity or selectivity.
The following salts have been synthesized and structurally characterized: Na[IrF]·2HO (2/, = 6.6327(4), = 10.0740(6), = 5.
View Article and Find Full Text PDFThermal decomposition of (NH4)3[IrCl6]·H2O, (NH4)2[IrCl6] and (NH4)2[IrBr6] in reductive and inert atmospheres has been investigated in situ using quick-EXAFS and temperature-resolved powder X-ray diffraction. For the first time, (NH4)2[Ir(NH3)Cl5] and (NH4)2[Ir(NH3)Br5] have been proven as intermediates of thermal decomposition of (NH4)3[IrCl6]·H2O, (NH4)2[IrCl6] and (NH4)2[IrBr6]. Thermal degradation of (NH4)2[IrCl6] and (NH4)2[IrBr6] is a more complex process as suggested previously and includes simultaneous formation of (NH4)2[Ir(NH3)Cl5] and (NH4)2[Ir(NH3)Br5] intermediates mixed with metallic iridium.
View Article and Find Full Text PDFSolid solutions of Zr(Mo,W)O(OH,Cl)∙2HO with a preset ratio of components were prepared by a hydrothermal method. The chemical composition of the solutions was determined by energy dispersive X-ray spectroscopy (EDX). For all the samples of ZrMoWO(OH,Cl)∙2HO (x = 0.
View Article and Find Full Text PDFThree hexafluoridoiridates(IV), Ca[IrF6].2H2O, Sr[IrF6].2H2O and Ba[IrF6].
Acta Crystallogr C
November 2007
The structures of the hexafluoridoiridates(IV) of calcium, Ca[IrF(6)].2H(2)O [calcium hexafluoridoiridate(IV) dihydrate], strontium, Sr[IrF(6)].2H(2)O [strontium hexafluoridoiridate(IV) dihydrate], and barium, Ba[IrF(6)] [barium hexafluoridoiridate(IV)], have been determined by single-crystal X-ray analysis.
View Article and Find Full Text PDFThe structures of orthorhombic bis[pentaammineaquacobalt(III)] tetra-mu(2)-fluorido-tetradecafluoridotrizirconium(IV) hexahydrate (space group Ibam), [Co(NH(3))(5)(H(2)O)](2)[Zr(3)F(18)].6H(2)O, (I), and bis[hexaamminecobalt(III)] tetra-mu(2)-fluorido-tetradecafluoridotrizirconium(IV) hexahydrate (space group Pnna), [Co(NH(3))(6)](2)[Zr(3)F(18)].6H(2)O, (II), consist of complex [Co(NH(3))(x)(H(2)O)(y)](3+) cations with either m [in (I)] or overline{1} and 2 [in (II)] symmetry, [Zr(3)F(18)](6-) anionic chains located on sites with 222 [in (I)] or 2 [in (II)] symmetry, and water molecules.
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