A.N. Zhdanova1, E.P. Solotchina1, P.A. Solotchin1, S.K. Krivonogov1,2, I.V. Danilenko1 1V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia 2Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia
Keywords: Bottom sediments, carbonates, XRD analysis, IR spectroscopy, Holocene, paleoclimate, Lake Chany, West Siberia
Subsection: PETROLOGY, GEOCHEMISTRY, AND MINERALOGY
Sediments of lakes located in closed basins in inland areas are an excellent archive of environmental and climatic changes. One of such archives is the Chany lake system located in the Baraba steppe of southern West Siberia and comprising three associated lakes: Bol’shie Chany, Malye Chany, and Yarkul’, connected by watercourses. We present the first data on the mineral composition of the Holocene sediments of Yarkovsky Pool of Lake Bol’shie Chany with predominantly carbonate sedimentation. The sediments were studied by X-ray diffraction (XRD), IR spectroscopy, electron microscopy, stable-isotope geochemistry (18O and 13C), laser granulometry, elemental analysis, and radioisotope dating. Mathematical modeling of complex XRD profiles of carbonate minerals in the sediments has revealed Mg-calcites with different Mg contents, excess-Ca dolomites, and aragonite. The obtained carbonate record gives an insight into the stratigraphic distribution of chemogenic carbonates, in which the number and proportion of phases are determined by the Mg/Ca ratio, salinity, and total alkalinity of the lake water. The phase proportions change depending on climatic cycles and lake level fluctuations. Comparison of the carbonate record with the lithologic data, d18O and δ13C values, and distribution of some geochemical indicators of depositional environments showed several stages of evolution of Yarkovsky Pool related to Holocene regional climatic changes.
R. Ben Smail1,2, M.F. Zid2, A. Driss2 1University of Carthage, Nabeul, Tunisia 2University of Tunis El Manar, Tunis, Tunisia
Keywords: X-ray diffraction, crystal structure, dichromate trichromate, 1,3-bis(4-piperidinium)propane.
A new organic-inorganic hybrid material (C13H28N2)2[Cr2O7][Cr3O10]×H2O (1) was synthesized by slow solvent evaporation at room temperature, and its crystal structure was determined by single crystal X-ray diffraction. This compound crystallizes in the monoclinic space group P21/c. The asymmetric unit contains two crystallographically independent 1,3-bis(4-piperidinium)propane, (H2bppp)2+ cations (A and B), one trichromate anion, one dichromate anion, and one water molecule. All these entities are interconnected into a complicated two-dimensional hydrogen bonded network via N-H⋯O and O-H⋯O hydrogen bonds. Furthermore, this structure is stabilized by a large number of C-H⋯O interactions, thus establishing a three-dimensional network structure. This compound appears to be the first example of chromates containing both Cr2O7 and Cr3O10 groups.
A. A. Udovenko, L. A. Zemnukhova, N. V. Makarenko
Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia
Keywords: синтез, кристаллическая структура, β-тетрафтороантимонат(III) калия, synthesis, crystal structure, potassium β-tetrafluoroantimonate(III)
Сrystals of the previously unknown polymorph of potassium tetrafluoroantimonate(III) (β-KSbF4) are synthesized and their crystal structure is determined (orthorhombic crystal system: a = 8.1631(5) Å, b = 7.8563(5) Å, c = 6.5396(4) Å, V = 419.40(5) Å3, Z = 4, dcalc = 3.751 g/cm3, F(000) = 424, space group Pmn21). The main structural units of β-KSbF4 within the first coordination sphere are dimer complex [Sb2F8]2- anions formed of trigonal SbF4E and tetragonal SbF5E bipyramids with a common vertex. The previously described α-KSbF4 polymorph consists of tetrameric [Sb4F16]4- complexes formed of SbF5E bipyramids.
A. M. Maharramov1, M. G. Tsintsadze2, R. A. Alieva1, F. N. Bahmanova1, F. O. Mamedova3, R. K. Askerov1, F. S. Alieva1, F. M. Chyragov1 1Baku State University, Baku, Azerbaijan 2Georgian Technical University, Tbilisi, Georgia 3Gandzha State University, Gandzha, Azerbaijan
Keywords: РСА, монокристалл, медь, сингония, синтез, single crystal XRD analysis, single crystal, copper, crystal symmetry, synthesis
A new copper(II) complex with acetylacetone and ethylenediamine is obtained using the template synthesis. It is studied by single crystal X-ray diffraction. The crystals are monoclinic: а = 7.7563(4) Å, b = 24.0157(12) Å, c = 24.6353(13) Å, β = 91.9490(10)°, V = 4586.2(4) Å3, space group P2(1)/c, Z = 2, dcalc = 1.713 g/cm3, R = 0.0695. The copper atom environment consists of two oxygen and two nitrogen atoms of the ligand, forming a slightly distorted square.
V. V. Krisyuk1, I. A. Baidina1, A. E. Turgambaeva1, I. V. Korolkov1,2, S. Urkasym kyz1, I. K. Igumenov1 1Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia 2Novosibirsk National Research State University, Novosibirsk, Russia
Keywords: цирконий, дикетонаты, кристаллическая структура, летучий металлорганический комплекс, MOCVD прекурсор, zirconium, diketonates, crystal structure, volatile organometallic complex, MOCVD precursor
A new zirconium(VI) complex with fluorinated methoxy substituted b-diketonate ZrL4 is synthesized where L = 1,1,1-trifluoro-5-methoxy-5-methylhexane-2,4-dionate. The complex sublimates without decomposition at a low pressure (10-2 Torr) at 140 °C. The crystal structure of the complex is molecular and composed of mononuclear ZrL4 molecules. Crystallographic data for C32H40F12O12Zr are: C2/c, a = 12.193(2) Å, b = 21.922(4) Å, c = 15.585(3) Å, β = 101.51(3)°, V = 4082.1(14) Å3, Z = 4, d = 1.523 g/cm3. The coordination environment of the zirconium atom is formed by eight oxygen atoms of four b-diketonate ligands; the coordination polymer is a square antriprism. The Zr-O distances are in the range 2.16-2.19 Å. The thermal properties of the complex are studied by TG-DTA.
T. I. Lappi1, Ya. M. Gayfulin2, A. I. Smolentsev1,2, Yu. V. Mironov1,2 1Novosibirsk National Research State University, Novosibirsk, Russia 2Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: рений, биоктаэдрический кластерный комплекс, координационный полимер, кристаллическая структура, rhenium, bioctahedral cluster complex, coordination polymer, crystal structure
The [Zn(H2O)4]3[Re12CS14(μ-SO2)(μ-S)2(CN)6]0.875[Re12CS14(μ-S)3(CN)6]0.125x6H2O compound (1) containing a new [Re12CS14(μ-SO2)(μ-S)2(CN)6]6- cluster anion is synthesized by the reaction of ZnCl2 and K6[Re12CS14(μ-S/SO/SO2)3(CN)6] in an aqueous solution and structurally characterized. Compound 1 crystallizes in a rhombic space group Pnma with the following unit cell parameters: a = 22.0834(7) Å, b = 28.2551(9) Å, c = 9.7775(3) Å, V = 6100.9(3) Å3, Z = 4, dcalc = 3.806 g/cm3. The crystal structure consists of two cluster anions in the ratio 7:1, occupying the same position, distorted [Zn(H2O)4]2+ cations, and solvate H2O molecules linked by hydrogen bonds.
E. E. Netreba1, N. V. Somov2 1Taurida Academy of Vernadsky Crimean Federal University, Simferopol, Russia 2Lobachevsky State University, Nizhny Novgorod, Russia
Keywords: бициклические бисмочевины, мебикар, гадолиний(III), структура, девятивершинник, ИК, РСА, bicyclic bisureas, mebicar, gadolinium(III), structure, nine-vertex polyhedron, IR, single crystal XRD
A centrosymmetric binuclear complex of gadolinium(III) nitrate with bicyclic bisurea (2,4,6,8-tetramethyl-2,4,6,8-tetraazabicyclo(3.3.0)octane-3,7-dione, or mebicar, Mk) [Gd(C8H14N4O2)(H2O)(NO3)3]2×H2O (I) is synthesized and its atomic structure (CIF file CCDC No. 1450653) is determined. The crystals of I are monoclinic: space group P 21/c, a = 10.3861(2) Å, b = 10.80470(10) Å, c = 21.2707(4) Å, β = 128.413(3)°, V = 1870.32 Å3, ρ(calc.) = 2.05094 g/cm3, Z = 2. The gadolinium atom occupies a general position and is coordinated by two oxygen atoms of two Mk molecules related by a symmetry-center operation, three bidentate nitrate anions, and a water molecule. The coordination polyhedron of the gadolinium atom is a nine-vertex polyhedron represented by a distorted three-cap trigonal prism; the Gd⋯Gd distance in the complex is 6.8697(4) Å.
Yuikhan Lu1,2, S. A. Mosyagina2,3, P. A. Stabnikov3, N. I. Alferova3, I. V. Korol'kov2,3, N. V. Pervukhina3, N. B. Morozova3 1Chinese-Russian Heilongjiang University, Heilongjiang, P. R. China 2Novosibirsk National Research State University, Novosibirsk, Russia 3Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: синтез, дипивалоилметанаты Ln(III), кристаллическая структура, летучесть, synthesis, Ln(III) dipivaloylmethanates, crystal structure, volatility
A series of Ln(III) dipivaloylmethanates of the composition Ln(dpm)3 (Ln = La, Tm, Yb) is obtained. It is established that Tm(dpm)3 and Yb(dpm)3 complexes are isostructural with Lu(dpm)3. The crystal structure of [La(dpm)3]2 at 150(2) K is determined (space group P21/n, a = 12.4412(5) Å, b = 28.0579(12) Å, с = 21.9533(8) Å, β = 105.796(2)°, V = 7373.9(5) Å3, Z = 4). The studied compound is isostructural with [Pr(dpm)3]2, [Eu(dpm)3]2, [Gd(dpm)3]2, and [Tb(dpm)3]2 complexes. The crystal structure of the complex is formed by dimeric [La(dpm)3]2 molecules. Thermogravimetric investigations show that the volatility of Ln(dpm)3 increases in the series from [La(dpm)3]2 to Yb(dpm)3. Melting points of the complexes are close to the known literature data.
N. U. Mulloev, J. Yusupova, B. I. Makhsudov
Tajik National University, Dushanbe, Republic of Tajikistan
Keywords: гетероциклические соединения, протоноакцепторная способность, производные диоксоланов, индукционное влияние, стерический фактор, heterocyclic compounds, proton acceptor ability, derivatives of dioxolanes, inductive effect, steric factor
The effect of the formation of Н complexes of some dioxolane derivatives with methyl alcohol on the parameters of stretching bands of the ОН group is studied. The observed changes in the spectral and energy characteristics of the complexes are due to the inductive effect of the introduced structural fragments on the equilibrium electron configuration of the COC group in position 1 of the proton acceptor. Based on the results obtained, the authors make the conclusion that the compounds studied are weak proton acceptors.
K. M. Turdybekov1, O. A. Nurkenov2, Zh. B. Satpaeva2, S. D. Fazylov2, S. A. Talipov3, B. T. Ibragimov3, A. S. Utegenova1 1Karaganda State Technical University, Karaganda, Republic of Kazakhstan 2Institute of Organic Synthesis and Coal Chemistry, Karaganda, Republic of Kazakhstan 3Sadykov Institute of Bioorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Republic of Uzbekistan
Keywords: РСА, тиосемикарбазид, кристаллогидрат, XRD, thiosemicarbazide, crystal hydrate
