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Vendilo A.G.,State Research Institute of Chemical Reagents and Special Purity Substances | Chistov V.I.,State Research Institute of Chemical Reagents and Special Purity Substances | Privalov V.I.,RAS Kurnakov Institute of General and Inorganic Chemistry
Russian Journal of Inorganic Chemistry | Year: 2012

The stability constants of the cesium complexes [Cs(DB21C7)] + and [Cs(DB24C8)] +, where DB21C7 = dibenzo-21-crown-7 and DB24C8 = dibenzo-24-crown-8, in the hydrophobic ionic liquid 1-butyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide ([BMIM][N(Tf) 2]) have been measured by 133Cs NMR spectroscopy between 24 and 54°C. The enthalpies and entropies of complexation have been determined. For [Cs(DB21C7)] + and [Cs(DB24C8)] + at 25°C, log K 1 = 3.52 (0.01) and 2.91 (0.04), ΔH 1 = -27 (1) and -7 (6) /mol, and ΔS 1 = -23 (3) and 33 (20) J/(mol K), respectively. © 2012 Pleiades Publishing, Ltd. Source


Akhmadullina N.S.,RAS Institute of Metallurgy | Churakov A.V.,RAS Kurnakov Institute of General and Inorganic Chemistry | Retivov V.M.,State Research Institute of Chemical Reagents and Special Purity Substances | Sandu R.A.,State Research Institute of Chemical Reagents and Special Purity Substances | Shishilov O.N.,RAS Kurnakov Institute of General and Inorganic Chemistry
Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya | Year: 2012

Cationic-anionic chloride complexes of gold(III), [(L)AuCl 2]BF 4 (L = 2,2'-bipyridine and 1,10- phenanthroline (Phen)), are synthesized. Their reactions and the reactions of complex [(Phen)AuCl 2]Cl with silver(I) and sodium acetates are studied. The chloride ligands in complexes [(L)AuCl 2]BF4 are easily substituted by the acetate ligands in the reaction with silver(I) acetate to form new carboxylate complexes [(L)Au(OAc) 2]BF 4. The reaction of complex [(Phen)AuCl 2]Cl with sodium acetate in glacial acetic acid affords binary complex salt [(Phen)AuCl 2][AuCl 4], which is characterized by single-crystal X-ray diffraction analysis. © Pleiades Publishing, Ltd., 2012. Source


Polishchuk O.M.,State Research Institute of Chemical Reagents and Special Purity Substances | Fakeev A.A.,State Research Institute of Chemical Reagents and Special Purity Substances | Krasil'shchik V.Z.,State Research Institute of Chemical Reagents and Special Purity Substances | Vendilo A.G.,State Research Institute of Chemical Reagents and Special Purity Substances
Inorganic Materials | Year: 2012

This paper examines isothermal potassium nitrate crystallization from aqueous solutions and the influence of metallic impurity concentration, percent crystallization, and washing of the crystals on the impurity distribution. We have obtained potassium nitrate with a content of each impurity in the range 5 × 10 -7 to 1 × 10 -5 wt %. © Pleiades Publishing, Ltd., 2012. Source

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