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One of the main directions of improving the competitiveness of the Russia under globalization of world economy is the development of all-round cooperation in the framework of the groupings of countries, such as the BRICS. The modern views on the essence of the Interstate Association of BRICS, its geopolitical and economic role are discussed in article. The main indicators for individual countries and BRICS in General, conclusions about the place of the BRICS in the world and the location of each country in the BRICS are given in the article. The analysis of the results of the research of the World Economic Forum «The Global Competitiveness Report 2014-2015» is conducted. The authors identified five groups of countries by level Competitiveness in the ranking of the World Economic Forum. Competitive advantages and the weak position of the BRICS countries in this rating are brought into paper. Five development strategies as a major competitive advantage combining BRICS are formed: Finance, Education, Business, Markets, Infrastructure. There are examples of each of these strategies.

Formalism is developed in which contributions of binary and ternary interactions towards free energy of a mixture of low-spin (A) and high-spin (B) isomers of spin crossover compounds as well as effects of ordering are taken into account. Parameters characterising non-ideality in this formalism are the excess free energy (ΔF_ex) and absolute asymmetries (Δ^A, Δ^B) of splittings of free energy levels. The excess free energy characterises the effects of binary interactions whereas asymmetries arise from ternary interactions. According to this model, the plateau in the spin crossover transition curve originates from the phenomenon of ordering taken into account in the Gorsky-Bragg-Williams approximation.

Considering many-body interactions in tetrahedral structures as perturbations of binary potentials by third bodies yields a free energy functional of the binary mixture equivalent to one earlier derived for spin crossover equilibrium in one-dimensional chains. Formal non-ideality parameters of this functional, the excess energy and asymmetries of splittings can be expressed in terms of molecular parameters based on binary potentials.

Chemical shifts (c.s.) of ¹Н nuclei in methanol are measured for methanol-benzene and methanol-phenanthrene systems. A method to determine the equilibrium constant of the molecular association reaction by NMR spectroscopy data is proposed for systems with low solubility of a compound when the dependence of c.s. on the composition is close to a straight line. The equilibrium constants for the formation of molecular complexes in methanol-benzene and methanol-phenanthrene systems are found.

The substitution reaction of thiocyanide groups of the complex K₄[Nb₆F₆Br₆(NCS)₆] in aqueous hydrochloric acid has afforded a new fluoride cluster anion [Nb₆FBrCl(H₂O)]^2- isolated as the salt (Me₄N)₂[Nb₆F₆Br₆Cl₄(H₂O)₂]⋅6H₂O (space group R3m, a = 11.230(5) Å, c = 26.230(5) Å, V = 2865(2) ų, Z = 3, R1 = 0.0362, R2w = 0.0886). The anion contains the cluster core Nb₆F₆Br₆ having ordered "inner" ligands. Difference in the atomic radii of "inner" ligands causes a significant distortion of the metal cluster along the three-fold axis.

The structure of the salt Cs[Gd(H₂O)₄Re₆Te₈(CN)₆]⋅4H₂O (space group P-1, a = 9.436(5) Å, b =
12.365(7) Å, c = 15.187(8) Å, α = 89.104(10)°, β = 86.996(10)°, γ = 82.304(9)°) has been established by single crystal XRD. The structure of the compound features layers involving Gd³⁺ cations bound to cluster anions [Re₆Te₈(CN)₆]^4- through cyanide groups. The interlayer space contains cesium cations and crystallization water molecules.

Supramolecular H-bonded complexes formed between p-ethoxybenzoic acid and 4,4′-dipyridyl or N,N′-dipyridylpiperazine were obtained as nematic liquid-crystalline phases. The corresponding crystals suitable for single crystal X-ray analysis were isolated and investigated. The stoichiomtery of complex 1 is (4,4′-dipyridyl)⋅2(p-ethoxybenzoic acid) and that of complex 2 is (N,N′-dipyridylpiperazine)⋅2(p-ethoxybenzoic acid). The molecular packing observed in the crystal structures investigated indicates that the mesogenic phases of the complexes are induced by H-bond interactions.

The structure of 8-carboxy-18-chloro-14-hydroxy-20-isopropyl-16-methoxy-4,8-dimethyl-15-oxaocta-
cyclo[11.7.1.0^3,120^4,90^12,190^14,180^16,210^17,20]henicosane has been determined by single crystal X-ray diffraction.

The products of the reaction of 2-alkenylthiopyridines with mercury iodide have been studied by single crystal X-ray diffraction. It has been demonstrated that the products are organomercury derivatives of salts of 2,3-dihydrothiazolo[3,2-a]pyridinium.

Benzyltriphenylphosphonium trans-tetrachloro(methanol)oxomolybdate(V) has been obtained from methanol suspension of benzyltriphenylphosphonium molybdate(VI) saturated with hydrogen chloride. The crystal structure comprises discrete trans-tetrachloro(methanol)oxomolybdate(V) anions and benzyltriphenylphosphonium cations. The anion has distorted octahedral geometry of central atom with visible trans influence imposed by short Mo-O bond (1.659(2) Å). The methanol O atom is bonded to the Mo atom, the bond being mostly electrostatic in character. A comparison with previously reported structures indicates that the methanol methyl moiety can switch between different positions with respect to the chloride ligands.