Kinetic regularities of ethylene oxidation to ethylene glycol monoacetate (EGMA) in the presence of a PdCl2 and Fe(NO3)3-containing catalytic system has been studied to clarify the peculiarities of the mechanism of this reaction.
Electrical conductivities were measured for the ternary systems Y(NO3)3+La(NO3)3+H2O, La(NO3)3+Ce(NO3)3+H2O, La(NO3)3+Nd(NO3)3+H2O, and their binary subsystems Y(NO3)3+H2O, La(NO3)3+H2O, Ce(NO3)3+H2O, and Nd(NO3)3+H2O at (293.15, 298.15 and 308.15) K. The measured conductivities were used to test the generalized Young’s rule and the semi-ideal
solution theory. The comparison results show that the generalized Young’s rule and the semi-ideal solution theory can yield
good predictions for the conductivities of the ternary electrolyte solutions, implying that the conductivities of aqueous
solutions of (1:3 + 1:3) electrolyte mixtures can be well predicted from those of their constituent binary solutions by the
simple equations. 相似文献
Syntheses were developed, and compounds of composition (NH4)2xK2yRb2zTh(NO3)6(x + y + z = 1) were prepared. These compounds were structurally studied using X-ray diffraction and IR spectroscopy. Incomplete miscibility
in the solid phase of the title system was found, and the impossibility of existence of a hexanitratothorate complex in the
(NH4)2Th(NO3)6-K2Th(NO3)6 system at 298.15 K and the component molar ratio 1: 3 was demonstrated. Calorimetric standard enthalpies of formation and
mixing at 298.15 K were determined.
Original Russian Text ? N.G. Chernorukov, A.V. Knyazev, A.A. Sazonov, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009,
Vol. 54, No. 7, pp. 1066–1071. 相似文献
The ion-solvent interaction of Sr(NO3)2 and Cd(NO3)2 in 10, 20 and 30 wt.% organic solvent (dioxane, glycol, methyl alcohol)-water mixtures at different temperatures has been studied using electrolytic conductivity data. The dissociation constant of the ion-pair Sr(NO3)+ and Cd(NO3)+ has been calculated along with ΔG0t, ΔG0t(cl) and ΔG0t(ch). The ion pairs interact with the solvents and the interaction is of the order dioxane+water>methyl alcohol+water>glycol+water. 相似文献
The thermochemical behavior of the coordination compound [Fe(urea)6](NO3)3 was studied by simultaneous CG–TG–DTG–DTA and mass spectrometry methods non-isothermal conditions. The compound decomposes at 200 °C into a mixture of spinel-type oxides and hematite. The nature and particle size of the final decomposition products are strongly associated with the conditions during the thermal treatments, in particular the heating rate and the calcination temperature. A certain fraction of the products are formed as nanometric particles; they show superparamagnetic behavior at room temperature. The comparably low temperature of the calcination treatments of this compound is a promising perspective to attain small sized magnetic powders. 相似文献
The magnetic properties of Cu(NH3)4(NO3)2 have been measured at low temperatures. Broad maxima in both the susceptibility and specific heat are observed and are consistent with linear chain behavior of a Heisenberg antiferromagnet, with J/k = 3.9 ± 0.1 K. Long-range order sets in at Tc = 0.15 ± 0.01 K, and the ratio kTc/|J| = 0.038 is the lowest observed as yet for a one-dimensional, S = 1/2 antiferromagnet. 相似文献
The viscosities of Sr(NO3)2 and Cd(NO3)2 have been determined in dioxane, glycol and methyl alcohol+water mixtures at 10, 20 and 30% by weight. The B values have been computed at different temperatures both from the Jones—Dole and Das's equation. From the B values, the effective rigid molar volume, its change with % of organic solvent, temperature and the ion—solvent interaction have been inferred. Activation parameters have also been calculated and the structure breaking effect has been deduced. 相似文献
An XRD analysis is used to study the single crystal of [Pd(NH3)4][Rh(NH3)(NO2)5] double complex salt at T = 150(2) K. Crystallographic characteristics are as follows: a = 7.6458(5) ?, b = 9.8813(6) ?, c = 9.5788(7) ?, β = 109.469(2)°, V = 682.30(8) ?3, P21/m space group, Z = 2, dx = 2.553 g/cm3. The geometry of the complex [Rh(NH3)(NO2)5]2− anion is described for the first time: Rh-N(NO2) distances are 2.020(4)–2.060(3) ?, Rh-N(NH3) 2.074(4) ?, N(NO2)-Rh-N(NH3) trans-angle is 178.8(2)°. 相似文献
The thermal decomposition reactions were determined for [Co(en)3](N03)3 and [Co(en)3(HSO4)3 in a dynamic nitrogen gas atmosphere and vacuo, where en represents ethylenediamine. Data were obtained using thermogravimetry, DTA, thermomagnetic analysis, and mass spectrometry. The dissociation reactions in nitrogen were found to be as follows: and In vacuo, the dissociation process for [Co(en)3](N03)3 is the same as in nitrogen. Also, the decomposition of [Co(en)3](HSO4)3 is the same except for the first step which is: 相似文献
The ionic coordination of Mg(NO3)2 in aqueous solutions has been investigated by X-ray diffraction. The experimental correlation functions appear to be characterized by the hydration of the cation. Satisfactory agreement with the experimental data has been reached through a model in which: (i) the nitrate ions do not produce any structuring effect in their neighbourhood; (ii) the Mg2+ ions possess an inner hydration shell of six water molecules and a second coordination shell. 相似文献
Phase diagram of a ternary liquid system [Th(NO3)4(TBP)2]-[UO2(NO3)2(TBP)2]-Exide 100 solvent was studied at 298.15–333.15 K.
Original Russian Text ? A.K. Pyartman, V.A. Keskinov, V.V. Lishchuk, Ya.A. Reshetko, V.E. Skobochkin, 2007, published in Zhurnal
Prikladnoi Khimii, 2007, Vol. 80, No. 8, pp. 1243–1245. 相似文献
A phase diagram for the hexane-[Y(NO3)3(TBP)3]-acetonitrile (1-2-3) liquid ternary at T = 298.15 K was studied. This ternary consists of two pairs of incompletely miscible liquids (hexane-acetonitrile and [Y(NO3)3(TBP)3]-hexane). It contains two homogeneous liquid fields and one two-phase liquid field. One phase is depleted of acetonitrile
and contains variable proportions of [Y(NO3)3(TBP)3] and hexane; the other contains variable proportions of acetonitrile and [Y(NO3)3(TBP)3] and small proportions of hexane. Intermolecular interaction parameters and excess Gibbs energies gE were calculated for binaries and the liquid ternary along binodal curves proceeding from miscibility data for the [Y(NO3)3(TBP)3]-hexane and hexane-acetonitrile binaries and the liquid ternary and using equations of the NTRL model. For the liquid ternary,
gE > 0.gE decreases in the following order of pairs of liquids: (1, 3), (1, 2), (2, 3). A computer algorithm is given for calculating binodal curves and tie-lines for the liquid ternary with the use of equations
of the NTRL model proceeding from the intermolecular interaction parameters.
Original Russian Text ? A.K. Pyartman, V.A. Keskinov, N.A. Charykov, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009,
Vol. 54, No. 2, pp. 350–356. 相似文献
The reaction of Ln(NO3)3·6H2O (Ln=La, Ce, Pr or Nd) with a sixfold excess of Ph3PO in acetone formed [Ln(Ph3PO)4(NO3)3]·Me2CO. The crystal structure of the La complex shows a nine-coordinate metal centre with four phosphine oxides, two bidentate and one monodentate nitrate groups, and PXRD studies show the same structure is present in the other three complexes. In CH2Cl2 or Me2CO solutions, 31P NMR studies show that the complexes are essentially completely decomposed into [Ln(Ph3PO)3(NO3)3] and Ph3PO. Similar reactions in ethanol gave [Ln(Ph3PO)3(NO3)3] only. In contrast for Ln=Sm, Eu or Gd, only the [Ln(Ph3PO)3(NO3)3] are formed from either acetone or ethanol solutions. For the later lanthanides Ln=Tb–Lu, acetone solutions of Ln(NO3)3·6H2O and Ph3PO gave [Ln(Ph3PO)3(NO3)3] only, even with a large excess of Ph3PO, but from cold ethanol [Ln(Ph3PO)4(NO3)2]NO3 (Ln=Tb, Ho–Lu) were obtained. The structure of [Lu(Ph3PO)4(NO3)2]NO3 shows an eight-coordinate metal centre with four phosphine oxides and two bidentate nitrate groups. In solution in CH2Cl2 or Me2CO the tetrakis-complexes show varying amounts of decomposition into mixtures of [Ln(Ph3PO)3(NO3)3], [Ln(Ph3PO)4(NO3)2]NO3 and Ph3PO as judged by 31P{1H} NMR spectroscopy. The [Ln(Ph3PO)3(NO3)3] also partially decompose in solution for Ln=Dy–Lu, forming some tetrakis(phosphine oxide) species. 相似文献
The thermolysis of complexes [Co(NH3)6][Fe(CN)6] and [Co(NH36]4[Fe(CN)6]3 under an air or hydrogen atmosphere at 200, 350, and 500°C is studied. The composition and properties of thermolysis products
are determined. The oxidative thermolysis yields mixtures of oxides of the central metals; the reductive thermolysis yields
intermetallic compounds CoFe. The density of the complexes and the specific surface area of the intermetallic compounds are
measured. Average particle sizes are calculated. The morphology and dispersion of the powders are dictated by the shape and
density of the crystals of the precursor double salts and the thermolysis temperature. The thermolysis chemism in the oxidative
and reductive atmospheres is discussed in the context of the nature of the complex anion.
Original Russian Text ? S.I. Pechenyuk, D.P. Domonov, D.L. Rogachev, A.T. Belyavskii, 2007, published in Zhurnal Neorganicheskoi
Khimii, 2007, Vol. 52, No. 7, pp. 1110–1115. 相似文献
Double complex salts (DCSs) [Co(NH3)6][Fe(CN)6] (I) and [Co(NH3)6]2[Cu(C2O4)2]3 (II) and complex [Co(NH3)6]2(C2O4)3·4H2O (III) are synthesized and investigated by single crystal XRD, crystal optics, and elemental analysis. The crystalline phases of
I, II, and III (R-3, P21/c, and Pnnm space groups respectively) have the following crystallographic characteristics: a = 10.9804(2) ?, b = 10.9804(2) ?, c = 10.8224(3) ?, V = 1130.03(4) ?3, Z = 3, dx = 1.65 g/cm3 (I); a = 9.6370(2) ?, b = 10.2452(2) ?, c = 13.2108(3) ?, V = 1932.90(9) ?3, Z = 2, dx= 1.97 g/cm3 (II), and a = 11.7658(3) ?, b = 11.7254(3) ?, c = 14.1913(4) ?, V = 1304.34(5) ?3, Z = 2, dx = 1.68 g/cm3 (III). This paper investigates the products of DCS thermolysis in a hydrogen atmosphere: the intermetallic compound CoFe with
the bcc parameter a = 2.852 ? for I and a heterogeneous mixture of Co and Cu in the decomposition of II. The coordinated CN− and C2O42− groups then turn into NH3, hydrocarbons, and CO2. The dominant hydrocarbon is methane. 相似文献
The complex salts ((DienH3)[IrCl6](NO3) (I), (DienH3)[PtCl6](NO3) (II), and (DienH3)[IrCl6]0.5[PtCl6]0.5(NO3) (III) (where Dien is NH2(CH2)2NH(CH2)2NH2) were synthesized and characterized by elemental, X-ray diffraction, and thermal analyses and by electronic and IR spectroscopies.
Solid solution of the composition Ir0.35Pt0.65 was obtained by decomposition of compound III in the atmosphere of hydrogen.
Original Russian Text ? E.V. Makotchenko, I.A. Baidina, P.E. Plusnin, L.A. Sheludyakova, Yu.V. Shubin, S.V. Korenev, 2007,
published in Koordinatsionnaya Khimiya, 2007, Vol. 33, No. 1, pp. 47–54. 相似文献
The solid–liquid equilibria of the ternary system H2O–Fe(NO3)3–Co(NO3)2 were studied by using a synthetic method based on conductivity measurements.
Two isotherms were established at 0 and 15 °C, and the stable solid phases which appear are the iron nitrate nonahydrate (Fe(NO3)3·9H2O), the iron nitrate hexahydrate (Fe(NO3)3·6H2O), the cobalt nitrate hexahydrate (Co(NO3)2·6H2O) and the cobalt nitrate trihydrate (Co(NO3)2·3H2O). 相似文献
