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1.
E. A. Kiseleva S. I. Troyanov Yu. M. Korenev 《Russian Journal of Coordination Chemistry》2007,33(2):85-89
Single crystals of Mg pivalate hydrate, Mg(H2O)6(Piv)2 · 3H2O (HPiv = (CH3)3CCOOH) are synthesized and their structure is determined by X-ray diffraction method. The crystals are rhombic: a = 10.917(2) Å, b = 12.625(2) Å, c = 31.394(8) Å, Z = 8, space group Pbca, R 1 = 0.0525. The Mg atom has octahedral surrounding of the O atoms of water molecules (Mg-O 2.044–2.137 Å). The cationic chains of [Mg(H2O)6] ∞ 2+ lie in the voids of doubled network anionic layers of [(H2O)3(Piv)2] ∞∞ 2? . Inside the layer, the pivalate anions alternate with water molecules in the xy plane, being bonded to them by hydrogen bonds. The cationic chains and the anionic layers are united into layered packs by hydrogen bonds between coordinated water molecules and pivalate anions and between coordinated and crystal hydrate water molecules. 相似文献
2.
I. P. Malkerova A. S. Alikhanyan I. G. Fomina Zh. V. Dobrokhotova 《Russian Journal of Inorganic Chemistry》2010,55(1):53-55
Sublimation of europium pivalate binuclear complexes Eu2(Piv)6 and [Eu2(Piv)6 · (Phen)2] (Piv = (CH3)3CCOO, Phen = C12H8N2) in the temperature range of 383–660 K is studied by the Knudsen effusion method with mass-spectrometric analysis of the
gas phase. The vaporization of Eu2(Piv)6 is shown to be accompanied by polymerization and the formation of Eu2(Piv)6 and Eu4(Piv)12 molecules. The saturated vapor over the mixed-ligand complex of europium pivalate with o-phenanthroline consists of Phen, Eu2(Piv)6, and Eu4(Piv)12 molecules. The partial pressures of the gas components, as well as the standard enthalpies of sublimation and dissociation
of the reaction proceeding with removal of phenanthroline have been determined. 相似文献
3.
Hong-Mei Ye Ke-Zhong Wu Jian-Jun Zhang Shu-Jing Sun Juan-Fen Wang Shu-Ping Wang 《Russian Journal of Inorganic Chemistry》2011,56(12):1914-1917
A novel lanthanide complex of [Nd(2-EOBA)3(phen)(H2O)]2 · H2O (2-EOBA = 2-ethoxylbenzoate, phen = 1,10-phenanthroline), has been synthesized and structurally characterized by single crystal X-ray diffraction. The complex crystallizes in monoclinic, space group P2(1)/n with a = 14.7453(18) Å, b = 12.3628(15) Å, c = 19.473(2) Å, α = 90°, β = 93.349(2)°, γ = 90°. Two Nd3+ ions are connected together by two bridging 2-EOBA ligands and each Nd3+ ion is further coordinated by two chelating 2-EOBA ligands, one chelating phen molecule and one water molecule. The coordination number of Nd3+ ion is nine. The coordination geometry of Nd3+ ion is a distorted monocapped square-antiprism. 相似文献
4.
Y. G. Sun W. Yu L. Wang S. T. Rong Y. L. Wu M. C. Zhu E. J. Gao 《Russian Journal of Coordination Chemistry》2010,36(1):43-47
Under hydrothermal conditions, the complex [Mn(lmdc)2(H2O)2] · 2H2O (I) was synthesized and characterized by elemental analysis and IR spectrum (HImdc = 4,5-imidazofedicarboxylic acid). The crystal structure of I was determined by single-crystal X-ray diffraction (crystallizing in the monoclinic crystal system, P 2/c space group, a = 11.000(2), b = 7.1281(14), c = 12.696(3) Å, β = 122.45(3), Z = 2. In I, the Mn2+ ion was chelated by two Imdc with one of their nitrogen atoms and a carboxylic oxygen atom, while two water molecules occupy the axial position of the Mn atom forming a distorted octahedral geometry. Three-dimensional structure of I was formed by intermolecular hydrogen bonds. UV-Vis and fluorescence spectra of I interacting with DNA show that insertion is the main binding mode between I and fish sperm DNA. Gel electrophoresis shows that I cleaves both supercoiled and circular pBR322 DNA to form a small molecular fragment. 相似文献
5.
Sabri Hassen Hammouda Chebbi Mohamed Faouzi Zid Youssef Arfaoui 《Journal of the Iranian Chemical Society》2018,15(12):2659-2668
The 3-amino-1,2,4-triazole (atz)-based manganese complex was prepared and characterized through single-crystal X-ray diffraction, IR, EPR, and UV–visible spectroscopy. In the crystal structure, individual complex are interconnected through N(O)–H…Cl hydrogen bonds into 1D undulating chains running parallel to the [110] direction of the unit cell. Chains further grow into 2D supramolecular layers by way of the lattice water molecules of coordination and the chloride anions (O–H…Cl). Layers pack along the b-axis of the unit cell mediated by O–H…Cl(N) and N–H…O(Cl) hydrogen bonds forming a 3D supramolecular architecture. The theoretical calculations were also performed to optimize the structure of the complexes in the gas phase to confirm the structures proposed by X-ray crystallography. In addition, IR and UV–visible spectra of complex were calculated and compared with the corresponding experimental spectra to complete the experimental structural identification. The three-dimensional Hirshfeld surface (3D-HS) and their relative two-dimensional fingerprint plots (2D-FP) reveal that the structure is dominated by H…Cl/Cl…H (50.5%), H…O/O…H (11.3%) and N…O/O…N (10.2%) contacts. 相似文献
6.
M. Yu. Shilova A. V. Vologzhanina L. B. Serezhkina V. N. Serezhkin 《Russian Journal of Inorganic Chemistry》2009,54(11):1763-1767
Single crystals of Li(H3O)[UO2(C2O4)2(H2O)] · H2O (I) have been synthesized and studied by X-ray diffraction. Compound I crystallizes in the monoclinic crystal system with the unit cell parameters: a = 7.1682(10) Å, b = 29.639(6) Å, c = 6.6770(12) Å, β= 112.3(7)°, space group P 21/c, Z = 4, R = 4.36%. Structure I contains discrete mononuclear groups [UO2(C2O4)2(H2O)]2? ascribed to the crystal-chemical group AB 2 01 M1 (A = UO2 2+, B01 =C2O 4 2? , M1 = H2O), which are “cross-linked” by the lithium ions into infinite layers {Li(UO2)(C2O4)2(H2O)2}? perpendicular to [010]. The hydroxonium ions are located between adjacent uranium-containing layers. A hydrogen bond system involving water molecules, oxalate ions, and hydroxonium combines the anionic layers into a three-dimensional framework. 相似文献
7.
X. -C. Lv Z. -C. Tan X. -H. Gao Q. Shi L. -X. Sun 《Journal of Thermal Analysis and Calorimetry》2009,95(2):387-392
A complex of neodymium perchloric acid coordinated with L-glutamic acid and imidazole, [Nd(Glu)(H2O)5(Im)3](ClO4)6·2H2O was synthesized and characterized by IR and elements analysis for the first time. The thermodynamic properties of the complex
were studied with an automatic adiabatic calorimeter and differential scanning calorimetry (DSC). Glass transition and phase
transition were discovered at 221.83 and 245.45 K, respectively. The glass transition was interpreted as a freezing-in phenomenon
of the reorientational motion of ClO4− ions and the phase transition was attributed to the orientational order/disorder process of ClO4− ions. The heat capacities of the complex were measured with the automatic adiabatic calorimeter and the thermodynamic functions
[H
T-H
298.15] and [S
T-S
298.15] were derived in the temperature range from 80 to 390 K with temperature interval of 5 K. Thermal decomposition behavior
of the complex in nitrogen atmosphere was studied by thermogravimetric (TG) analysis and differential scanning calorimetry
(DSC). 相似文献
8.
A novel Salen-type bisoxime ligand, 6,6′-dimethoxy-2,2′-[(1,4-butylene)dioxybis(nitrilomethylidyne)]diphenol (H2L) and its tetranuclear Cu(II) complex, [Cu4L2(pic)4(H2O)2]·2H2O, have been synthesized and characterized by elemental analyses, IR, TG-DTA and 1H-NMR etc. The X-ray crystal structure of the complex reveals that formation of a tetranuclear structure, which consists of four copper(II)
atoms, two pentadentate L2−units, four picratols, two coordinated water molecules and two crystallizing water molecules. Around four copper ions are
all octahedral geometries. It was demonstrated that the picratols in the tetranuclear copper(II) complex show a novel tridentate
coordination mode. 相似文献
9.
G. B. Andreev M. Yu. Antipin N. A. Budantseva N. N. Krot 《Russian Journal of Coordination Chemistry》2005,31(11):800-803
A new neptunium(V) complex [(NpO2)2(CH3COO)2(H2O)] ? 2H2O was synthesized and its crystal structure was determined. The unit cell parameters are: a = 24.007(10) Å, b = 6.779(3) Å, c = 8.076(3) Å, space group Pnma, Z = 4, V = 1314.2(9) Å3, R = 0.049, wR(F2) = 0.105. The crystal structure of the compound is composed of neutral [(NpO2)2(CH3COO)2(H2O)] layers and molecules of the water of crystallization. Each of the crystallographically independent neptunoyl ions performs a bidentate function thus forming a composite system of cation-cation bonds. 相似文献
10.
B. T. Usubaliev P. S. Abdurakhmanova M. K. Munshieva D. M. Ganbarov 《Russian Journal of Coordination Chemistry》2010,36(11):865-869
The clathrate [Zn(C6H5COO)2(H2O)2] · 2CH3COOH (I) was obtained for the first time from zinc(II) benzoate. The individuality, the unit cell parameters, and the number of “guest”
molecules in complex I were determined from X-ray diffraction and derivatographic data. Its crystal structure was solved. 相似文献
11.
The reaction of the trinuclear oxo-centered mixed-valence complex [Mn3O(O2CPh)6(Py)2(H2O)] with 2,2′-bipyridyl (Bipy) and another potential tripodal ligand affords the title compound [Mn3(PhCO2)6(Bipy)2] · H2O in good yield. The X-ray crystallographic diffraction study reveals that three mangenese ions are arranged in a linear mode with Mncenter-Mnterminal and Mnterminal-Mnterminal diatances of 3.588 and 7.176 Å, respectively. Molar magnetic susceptibility of the compound gradually decreases from 12.23 (300 K) to 4.45 cm3 K mol?1 (2 K). Taking into account the structure of this compound, the data in the 2.0–300 K range were fit to the appropriate theoretical expression to give J = ?2.73 cm?1, ρ = 2.07%, N a = ?0.0004 cm3 mol?1, g = 1.992, and R 2 = 0.99996. The magnetization versus external magnetic field measurements at 2 K shows that the ground state is S T = 5/2. 相似文献
12.
A complex of Erbium perchloric acid coordinated with l-aspartic acid and imidazole, Er2(Asp)2(Im)8(ClO4)6·10H2O was synthesized for the first time. It was characterized by IR and elements analysis. The heat capacity and thermodynamic
properties of the complex were studied with an adiabatic calorimeter (AC) from 80 to 390 K and differential scanning calorimetry
(DSC) from 100 to 300 K. Glass transition and phase transition were discovered at 220.45 and 246.15 K, respectively. The glass
transition was interpreted as a freezing-in phenomenon of the reorientational motion of ClO4− ions and the phase transition was attributed to the orientational order/disorder process of ClO4− ions. The thermodynamic functions [H
T
− H
298.15] and [S
T
− S
298.15] were derived in the temperature range from 80 to 390 K with temperature interval of 5 K. Thermal decomposition behavior
of the complex in nitrogen atmosphere was studied by thermogravimetric (TG) analysis and differential scanning calorimetry
(DSC). 相似文献
13.
P. N. Bourosh O. A. Bologa M. Gdaniec Yu. A. Simonov N. V. Gerbeleu 《Journal of Structural Chemistry》2005,46(3):488-493
A new Co(III) complex of 1,2-cyclohexanedionedioxime and thiocarbamide with an SO 4 2? anion and solvation water molecules in the outer sphere has been synthesized and its structure has been defined. Orthorhombic crystals, a = 11.659(2) Å, b = 26.448(5) Å, c = 30.142(6) Å, V = 9295(3) Å 3, Z = 8, dcalc = 1.599 g/cm3, space group Pbca; final R index is 0.0578 for 8221 reflections with I > 2σ(I). In the octahedral Co(III) complex, two 1,2-cyclohexanedionedioxime residues lie in the equatorial plane, while two thiocarbamide molecules are in the axial plane. Intramolecular bonds: N-H…O and O-H…O type hydrogen bonds and π-π interactions that stabilize the complex cations. In crystal, the components are linked by N-H…O and O-H…O hydrogen bonds into a 3D framework. 相似文献
14.
A. B. Ilyukhin Zh. V. Dobrokhotova S. P. Petrosyants 《Russian Journal of Inorganic Chemistry》2008,53(1):48-54
The reaction of [Sc(OH)(H2O)5]2Cl4 · 2H2O in isopropanol with 4,4′-Bipy in CHCl3 produced a crystalline compound, which was identified as [H4(4,4′-Bipy)3][Sc(OH)(H2O)5]2Cl8 (I) by elemental analysis, IR spectra, and single-crystal X-ray diffraction. In the structure of compound I, the three protonated diimine molecules form a centrosymmetric trimer via N...N hydrogen bonds. The polyhedron around the Sc atom is an octahedron with one split vertex. The excursion of the Sc atom from the plane formed by the oxygen atoms (water molecules) toward the hydroxo bridges is 0.5 Å. The thermolysis of compound I generates ScCl3, whereas the final decomposition product of the precursor dimer is ScOCl. 相似文献
15.
The crystal structure of the coordination compound Na[RuNOCl3(H2O)OH]·2H2O is reported. The complex is studied by IR and NMR spectroscopy, powder and single crystal X-ray diffraction. Crystallographic data determined for H7Cl3NNaO5Ru is: a = 6.648(2) ?, b = 8.216(7) ?, c = 10.063(3)?, α= 89.75(6)°, β = 70.96(2)°, γ = 78.76(5)°, V = 967.9(2) ?3, P1 space group, Z = 4, d x = 2.165 g/cm3. 相似文献
16.
Ray L. Frost Sara J. Palmer Ross E. Pogson 《Journal of Thermal Analysis and Calorimetry》2012,107(3):905-909
Thermogravimetry combined with evolved gas mass spectrometry has been used to characterise the mineral crandallite CaAl3(PO4)2(OH)5·(H2O) and to ascertain the thermal stability of this ‘cave’ mineral. X-ray diffraction proves the presence of the mineral and
identifies the products of the thermal decomposition. The mineral crandallite is formed through the reaction of calcite with
bat guano. Thermal analysis shows that the mineral starts to decompose through dehydration at low temperatures at around 139 °C
and the dehydroxylation occurs over the temperature range 200–700 °C with loss of the OH units. The critical temperature for
OH loss is around 416 °C and above this temperature the mineral structure is altered. Some minor loss of carbonate impurity
occurs at 788 °C. This study shows the mineral is unstable above 139 °C. This temperature is well above the temperature in
the caves of 15 °C maximum. A chemical reaction for the synthesis of crandallite is offered and the mechanism for the thermal
decomposition is given. 相似文献
17.
M. S. Tarasenko N. G. Naumov A. V. Virovets S. -J. Kim V. E. Fedorov 《Journal of Structural Chemistry》2008,49(6):1128-1131
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. 相似文献
18.
A. P. Tyutyunnik V. G. Zubkov V. N. Krasil’nikov I. F. Berger L. A. Perelyaeva I. V. Baklanova M. Yu. Skripkin G. Svensson 《Journal of Structural Chemistry》2011,52(2):350-357
By the hydration of MVO(SeO4)2 with saturated water vapors at room temperature a series of isostructural complex compounds of vanadium(V) of the composition
M[VO2(SeO4)(H2O)2]·H2O (K, Rb, NH4) are synthesized and their physicochemical properties are studied. Based on the X-ray and neutron diffraction data, it is
found that their crystal structure is composed of VO6 octahedra linked in infinite chains by bridging SeO4 tetrahedra. Each of the VO6 octahedra has two short terminal V-O bonds forming a bent dioxovanadium group VO2+. Two water molecules are coordinated by vanadium and one molecule is out of the first coordination sphere in the interchain
space. The vibrational spectra of the studied compounds are completely consistent with their structural features. 相似文献
19.
L. B. Serezhkina E. V. Peresypkina A. V. Virovets I. V. Medrish D. V. Pushkin 《Russian Journal of Inorganic Chemistry》2009,54(10):1577-1580
Single crystals of Cs[(UO2)2(C2O4)2(OH)] · H2O were synthesized and structurally studied using X-ray diffraction. The compound crystallizes in monoclinic space group P21/m, Z = 2, with the unit cell parameters a = 5.5032(4) Å, b = 13.5577(8) Å, c = 9.5859(8) Å, β = 97.012(3)°, V = 709.86(9) Å3, R = 0.0444. The main building units of crystals are [(UO2)2(C2O4)2(OH)]? layers of the A2K 2 02 M2 (A = UO 2 2+ , K02 = C2O 4 2? , and M2 = OH?) crystal-chemical family. Uranium-containing layers are linked into a three-dimensional framework via electrostatic interactions with outer-sphere cations and hydrogen bonds with water molecules. 相似文献
20.
Three new lanthanide(III) complexes of the type [Ln(PBH)2(NO3)(NCS)(H2O)]NO3·nH2O (PBH = 2-pyridinecarboxaldehyde benzoyl-hydrazone) have been prepared from the complexes [Ln(PBH)2(NO3)3]·CH3COCH3·2H2O by anion metathesis reaction and studied by elemental analyses, IR and UV–Vis spectra. The crystal structure of the [Ce(PBH)2(NO3)(NCS)(H2O)]NO32.35H2O complex was determined by X-ray diffraction. The crystals of the compound isothiocyanato-nitrato-aquo-bis[N-(2-pyridinylmethylene)-N-benzoyl-hydrazino]-cerium(III) nitrate 2.35 hydrate are monoclinic with crystallographic P21 n symmetry. The coordination sphere consists of two tridentate 2-pyridinecarboxaldehyde benzoylhydrazone, one bidentate nitrate, one isothiocyanate, and one water molecule as ligands. The coordination polyhedron around the cerium atom can be described as a distorted bicapped square antiprism. The coordination of the hydrazone ligand to the metal atom is accomplished through the pyridine nitrogen, the azomethine nitrogen, and the carbonyl oxygen. 相似文献