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1.
N.V. Loginova T.V. Kovalchuk R.A. Zheldakova A.A. Chernyavskaya N.P. Osipovich G.K. Glushonok G.I. Polozov V.N. Povalishev V.L. Sorokin O.I. Shadyro 《Polyhedron》2006,25(18):3603-3610
Cu (II) complexes with 3,5-di(tert-butyl)-1,2-benzenediol (I), 4,6-di(tert-butyl)-1,2,3-benzentriol (II) and sulfur-containing sterically hindered o-diphenol derivatives such as 4,6-di(tert-butyl)-3-(2-hydroxyethylsulfanyl)-1,2-benzenediol (III) and 2-[4,6-di(tert-butyl)-2,3-dihydroxyphenylsulfanyl]acetic acid (IV) have been synthesized and characterized by means of elemental analysis, TG/DTA, FT-IR, ESR, XPS, XPD and conductivity measurements. Antifungal activities of these ligands and their respective Cu (II) complexes have been determined against Aspergillus niger, Fusarium sp., Penicillium lividum, Mucor sp. and Botrytis cinerea. Most of the compounds (both the free ligands and the complexes) exert pronounced antifungal activities (RI 70%), and virtually all of them (apart from the Cu(LII)2 complex) have the highest inhibitory properties (RI = 100%) against B. cinerea. 相似文献
2.
A. I. Lytkin N. V. Chernyavskaya A. V. Volkov V. M. Nikol’skii 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2007,81(7):1025-1029
The energy of combustion of N-(carboxymethyl)aspartic acid (CMAA) was determined by bomb calorimetry in oxygen. The standard enthalpies of combustion and formation of crystalline N-(carboxymethyl)aspartic acid were calculated. The heat effects of solution of crystalline CMAA in water and a solution of sodium hydroxide were measured at 298.15 K by direct calorimetry. The standard enthalpies of formation of CMAA and its dissociation products in aqueous solution were determined. 相似文献
3.
Natalia V. Loginova Tat’yana V. Koval’chuk Rimma A. Zheldakova Anna A. Chernyavskaya Nikolai P. Osipovich Gennady K. Glushonok Henry I. Polozov Victor L. Sorokin Oleg I. Shadyro 《Central European Journal of Chemistry》2006,4(3):440-457
Cu (II) complexes with the sterically hindered diphenol derivatives 3,5-di(tert-butyl)-1,2-benzenediol (I), 4,6-di(tert-butyl)-1,2,3-benzenetriol (II) and the sulfur-containing 4,6-di(tert-butyl)-3-(2-hydroxyethylsulfanyl)-1,2-benzenediol (III) and 2-[4,6-di(tert-butyl)-2,3-dihydroxyphenylsulfanyl]acetic acid (IV) have been synthesized and characterized by elemental analysis, TG/DTA, FT-IR, ESR, XPS, XPD and conductivity measurements.
Compounds I–III can coordinate in their singly deprotonated forms and act as bidentate ligands. These compounds yield Cu (II) complexes of the stoichiometry Cu(L)2, which have square planar geometry (g| > g⊥ > ge). Unlike them, compound IV behaves as a terdentate ligand, and its complex Cu(LIV)2 has distorted octahedral geometry. According to ESR data, only the Cu(LII)2 complex contains a very small amount of phenoxyl radicals. Antimicrobial activities of these ligands and their respective
Cu (II) complexes have been determined with respect to Gram-positive and Gram-negative bacteria, as well as on yeasts. Their
phytotoxic properties against Chlorella vulgaris 157 were also examined. 相似文献
4.
We consider an equation
where , and By a solution of equation (1), we mean any function such that and equality (1) holds almost everywhere on In this paper, we obtain a criterion for the correct solvability of (1) in ,
where , and By a solution of equation (1), we mean any function such that and equality (1) holds almost everywhere on In this paper, we obtain a criterion for the correct solvability of (1) in ,
5.
The reactions of dodecamethylcyclohexasilane with chlorides of I, II, IV—VI, and VIII Group metals were studied as a promising approach to the synthesis of functional oligosilanes. When cyclohexasilane reacts with metal chlorides without a solvent at elevated temperatures, the process is intensified and, in some cases, the selectivity of formation of chloro derivatives of linear and cyclic permethyloligosilanes increases. The cyclolinear permethylpolysilane-siloxanes were prepared by heterofunctional polycondensation of the resulting oligosilanes with bifunctional cyclic and linear permethyloligosiloxanes. Cyclolinear permethylpolyoxysilane was synthesized for the first time by the reaction of 1,3-dihydroxycyclohexasilane with 1,3-dichlorohexamethyltrisilane. 相似文献
6.
7.
V. P. Vasil'ev A. V. Katrovtseva A. I. Lytkin N. V. Chernyavskaya 《Journal of Analytical Chemistry》2004,59(3):206-210
The complexation of zirconium(IV) with Semimethylthymol Blue (H4L) was studied by spectrophotometry. The formation of the (ZrOH)2(H2L)2+
2 complex with log = 20.68 ± 0.12 and 565 = (7.26 ± 0.02) × 104 was revealed by the isomolar series and molar ratio methods. A simple, reliable, and sensitive method was developed for the photometric determination of zirconium. The calibration plot is linear in the concentration range of 10–6–10–5 M zirconium. In a sample of frit 24–70 containing 5.7% ZrO2, 5.44 ± 0.15% ZrO2 was found. 相似文献
8.
A. I. Lytkin N. V. Chernyavskaya V. E. Litvinenko V. M. Nikol’skii 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(6):899-902
The enthalpies of complex formation between iminodisuccinic acid (H4L) and the Cd2+ ion were determined calorimetrically at 298.15 K and ionic strengths 0.5, 1.0, and 1.5 (KNO3). The thermodynamic characteristics of formation of CdL2− and CdHL− complexes at fixed and zero ionic strength values were calculated. 相似文献
9.
10.
N. V. Chernyavskaya I. V. Fadeeva S. A. Bychkova 《Russian Journal of Inorganic Chemistry》2014,59(8):903-906
Calorimetric enthalpies of complexation of L-aspartic acid (H2Asp) with Cd2+ ion at 298.15 K and ionic strengths of 0.5, 0.75, and 1.0 (KNO3) were determined. The thermodynamic parameters of complex formation reactions (for CdAsp and CdAsp 2 2? complexes) at zero and nonzero ionic strength were calculated. 相似文献