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1.
《Journal of chemical crystallography》2011,41(7):1077-1084
Abstract
The crystal structures of two zinc(II) 4-chloro- and 5-chlorosalicylate complexes, [Zn(4-ClC6H3-2-(OH)COO)2(H2O)4]·2tph·(H2O)2 (I) and [Zn(5-ClC6H3-2-(OH)COO)2(ina)2(H2O)] (II), where tph is theophylline and ina is isonicotinamide, have been determined using X-ray diffraction methods. Crystals of both (I) and (II) are triclinic, space group P-1, with Z = 1 in a cell with a = 7.2220(3), b = 8.59700(10), c = 16.0210(5) ?, α = 75.990(2), β = 83.959(2), γ = 68.455(2)°, V = 897.54(5) ?3 (I) and with Z = 2 in a cell with a = 11.4148(11), b = 11.5327(10), c = 12.0685(13) ?, α = 63.458(6), β = 87.547(8), γ = 89.387(7)°, V = 1419.9(2) ?3 (II). The coordination environment of the zinc(II) atom of compound (I) consists of two unidentate carboxylate oxygen atoms and four oxygen atoms of aqua ligands, forming a distorted octahedral configuration. Two theophylline molecules and the remaining water molecules are bound only by hydrogen bonds. The Zn atom of compound (II) is pentacoordinated with two unidentate carboxylate oxygen atoms, two pyridine nitrogen atoms of isonicotinamide ligands, and the oxygen atom of the aqua ligand, forming a distorted configuration between square pyramid and trigonal bipyramid. In both complexes intramolecular O–H···O hydrogen-bonding interactions are present. In the crystal structures, molecules are linked by intermolecular O–H···O and N–H···O hydrogen bonds. The structures are analyzed and compared to the similar Zn(II) complexes, with the chromophores ZnO6 and ZnO3N2. 相似文献2.
Abstract
A cyano-bridged bimetallic assembly, [MnIII(salen)]2[FeII(CN)5NO]·2H2O [salen = N,N′-1,2-ethylenebis(salicylideneiminato)dianion], has been prepared and characterized structurally and magnetically. It crystallizes in the tetragonal space group P4/ncc with a = b = 14.813(2) ?, c = 17.093(5) ?, V = 3750.6(13) ?3, Z = 4. In this complex, each [Fe(CN)5NO]2− unit connects four [Mn(salen)]+ units with its four co-planar cyanide groups, and each [Mn(salen)]+ unit is linked to two [Fe(CN)5NO]2− ions in trans-form, which results in a two-dimensional (2-D) network consisting of pillow-like octanuclear [–FeII–CN–MnIII–NC–]4 units with dimensions: Fe–C = 1.943(3) ?, C≡N– = 1.139(4) ?, Mn–N = 2.326(3) ?, Fe–C≡N = 178.0(3)°, Mn–N≡C = 161.7(3)°. The NO group of [Fe(CN)5NO]2− remains monodentate and the bond angle of Fe–N–O is linear (180.0°). The variable temperature magnetic susceptibilities, measured in the 1.8–300 K range, show a weak MnIII···MnIII antiferromagnetic interaction through the diamagnetic –NC–FeII–CN– bridges. 相似文献3.
Jing-cai Yao Xin-xiang Cao Li Zhang Yu-fang Wang Jin-bo Guo Cui-ping Fan 《Journal of chemical crystallography》2011,41(9):1400-1405
Abstract
The title complex {[Yb(1,4-BDC)1.5(H2O)4]·H2O}n (1) (1,4-BDC = 1,4-benzenedicarboxylate) has been hydrothermally synthesized and structurally characterized by the single crystal X-ray diffraction. Crystals of compound 1 belongs to the triclinic crystal system, space group P-1; a = 7.549(3) ?, b = 10.072(4) ?, c = 10.470(4) ?, α = 87.810(4)°, β = 82.531(4)°, γ = 86.306(4)°, V = 787.3(5) ?3, Z = 2. The Yb(III) atoms are linked by the deprotonated 1,4-BDC ligands in two kinds of bridging modes. Four Yb(III) atoms at each corner (nodes) and four 1,4-BDC ligands at each edge (spacers) form a edge–sharing 36-membered rings. The rhombohedral Yb4(1,4-BDC)4 arranged in an alternating fashion to construct a 1D ladder-like chain along the c axis. Two neighboring chains are linked to each other in a parallel fashion to construct 3D supramolecular structure by O–H···O hydrogen bonds and π–π stacking interactions. In addition, the properties of thermogravimetric analysis and magnetic behaviors of the complex have been also discussed. 相似文献4.
Z. A. Carlson Bronwyn L. Harrod Daniel Widener William A. Howard Keliang Pang 《Journal of chemical crystallography》2010,40(10):863-866
Abstract
[Zn(H2O)6][{Zn(H2O)}2(ttha)]·4H2O (ttha = triethylenetetraamine-N,N,N′,N″,N‴,N‴-hexaacetate) has been structurally characterized (triclinic, P-1, a = 7.4014(4) ?, b = 8.5521(4) ?, c = 15.0309(7) ?, α = 73.582(1)°, β = 85.173(1)°, γ = 69.935(1)°; V = 857.15(7) ?3; Z = 1). The two Zn2+ ions bound by the [ttha]−6 ligand are in distorted octahedral environments. While there exists a center of symmetry in the [{Zn(H2O)}2(ttha)]2− anion in the crystalline state, 13C{1H} NMR spectroscopy demonstrates the absence of a center of symmetry in aqueous solution. Furthermore, electronic absorption spectroscopy reveals that [Zn(H2O)6][{Zn(H2O)}2(ttha)]·4H2O reacts with vanadyl(IV) acetate in aqueous solution at room temperature to yield [(VO)2(ttha)]2−. This reaction implies that Zn2+ can dissociate from [{Zn(H2O)}2(ttha)]2− in aqueous solution. 相似文献5.
Guo-Fang Zhang Mei-Yu Cai Ping Jing Chong He Ping Li Feng-Qi Zhao Ji-Zhen Li Xue-Zhong Fan Seik Weng Ng 《Journal of chemical crystallography》2010,40(3):278-282
Abstract
Two transition-metal compounds derived from 2,4-dinitroimidazole, {[Ni(DNI)2(H2O)3][Ni(DNI)2(H2O)4]}·6H2O, 1, and Pb(DNI)2(H2O)4, 2, were characterized by elemental analysis, FT-IR, TG-DSC and X-ray single-crystal diffraction analysis. Crystal data for 1: monoclinic, space group C2/c, a = 26.826(3), b = 7.7199(10), c = 18.579(2) ?, β = 111.241(2)° and Z = 4; 2: monoclinic, space group C2/c, a = 6.5347(6), b = 17.1727(17), c = 14.1011(14) ?, β = 97.7248(10) and Z = 4. Compound 1 contains two isolated nickel centers in its structure, one being six-coordinate and another five-coordinate. The structure of 2 contains a lead (II) center surrounded by two chelating DNI ligands and four water molecules in distorted square-antiprism geometry. The abundant hydrogen bonds in two compounds link the molecules into three-dimensional network and stabilize the molecules. The TG-DSC analysis reveals that the first step is the loss of water molecules and the final residue is the corresponding metal oxides and carbon. 相似文献6.
[NH3(CH2)3NH3]2[Ni(HP2O7)2(H2O)2] 4H2O (NiDAP) is a new diphosphate of transition metallic and organic cations obtained from a mixture of H4P2O7, 2NiCO3 Ni(OH)2 4H2O and NH2(CH2)3NH2 in a 1:1/6:1 molar ratio. This mixed organo-mineral compound crystallizes in the triclinic system, P¯, with the unit cell dimensions: a = 7.3678(3)~Å, b = 7.8018(5)Å, c = 11.1958(7)Å, = 76.914(4), = 81.052(4), = 85.46(1), V = 618.57(6)Å3 and Z = 1. The crystal structure of NiDAP consists of a complex anion, [Ni(HP2O7)2(H2O)2]4– and a diammoniumpropane cation. The complex anion is built up from two neutral water molecules (OW1) and two diphosphosphoric anions coordinated to Ni(II) in a bidentate chelating manner. (OW1) molecules link anionic complexes, [Ni(HP2O7)2(H2O)2]4– to create a thick bidimensional layers parallel to the (a, b) plane. These layers are interconnected in three dimensions through hydrogen bonds established between organic cations, the remaining water molecules OW2, OW3, and some external oxygen atoms of the anionic complex arrays. NiDAP was also characterized by IR spectroscopy, TG-DTA, and DSC analyses. 相似文献
7.
Abstract The compound investigated in this study contains a novel centrosymmetric heteroanion [Zn2V10O28(H2O)10]2−. This cluster results from the connection between a V10O28 group and two Zn(2)O(OH2)5 octahedra. The Zn(1)O6 octahedron and three water molecules associated with it are located between the different layers. The [Zn(H2O)6][Zn2V10O28(H2O)10] · 6H2O compound belongs to P-1 space group, with a = 8.967(2) ?, b = 10.390(4) ?, c = 12.338(13) ?, α = 108.31(7)°, β = 100.68(7)°, γ = 103.00(3)°, V = 1022(1) ?3 and Z = 1. Refinement gave R = 0.035 and wR(F2) = 0.098 for 3837 unique observed reflexions [I > 2σ(I)].
Index Abstract The compound investigated in this study contains a novel centrosymmetric heteroanion [Zn2V10O28(H2O)10]2−. This cluster results from the connection between a V10O28 group and two Zn(2)O(OH2)5 octahedra.
相似文献
8.
Joanna Kobylecka Rafal Kruszynski Slawomir Beniak Ewelina Czubacka 《Journal of chemical crystallography》2012,42(4):405-415
Abstract
The zinc(II) and cadmium(II) 2,4-dichlorophenoxyacetate salts were synthesized in mixed water–methanol environment and characterized by elemental analysis, IR spectrometry and thermal analysis coupled with mass spectrometry. The crystal structures were determined by X-ray crystallography (compound 1, [C18H18Cl4O8Zn] n : monoclinic, P21/c, a = 19.094, b = 7.378, c = 8.008, α = 90.00, β = 101.134, γ = 90.00, V = 1106.95; compound 2, [C16H14Cl4O8Cd] n : monoclinic, P21/c, a = 17.730, b = 7.293, c = 8.060, α = 90.00, β = 95.18, γ = 90.00, V = 1037.9). The structural and some thermal data about the presented cadmium salt were previously reported (Song et al. Acta Crystallogr E 62:m2397, 2006; Kobylecka et al. Thermochim Acta 482:49, 2009). 相似文献9.
Three Sr2+ compounds with the Edta
4− and H2
Edta
2− ligands—Sr2(Edta) · 5H2O (I), Sr2(H2
Edta)(HCO3)2 · 4H2O (II), and Sr2(H2
Edta)Cl2 · 5H2O (III)—are synthesized, and their crystal structures are studied. In I, the Sr(1) atom is coordinated by the hexadentate Edta
4− ligand following the 2N + 4O pattern and by two O atoms of the neighboring ligands, which affords the formation of zigzag
chains. The Sr(2) atom forms bonds with O atoms of five water molecules and attaches itself to a chain via bonds with three
O atoms of the Edta
4− ligands. The Sr(1)-O and Sr(2)-O bond lengths fall in the ranges 2.520(2)–2.656(3) and 2.527(3)–2.683(2) ?, respectively.
The Sr(1)-N bonds are 2.702(3) and 2.743(3) ? long. In II and III, the H2
Edta
2− anions have a centrosymmetric structure with the trans configuration of the planar ethylenediamine fragment. The N atoms are blocked by acid protons. In II, the environment of the Sr atom is formed by six O atoms of three H2
Edta ligands, two O atoms of water molecules, and an O atom of the bicarbonate ion, which is disordered over two positions. In
III, the environment of the Sr atom includes six O atoms of four H2
Edta
2− ligands and three O atoms of water molecules. The coordination number of the Sr atoms is equal to 8 + 1. In II and III, the main bonds fall in the ranges 2.534(3)–2.732(2) and 2.482(2)–2.746(3) ?, whereas the ninth bond is elongated to 2.937(3)
and 3.055(3) ?, respectively. In II, all the structural elements are linked into wavy layers. The O-H…O interactions contribute to the stabilization of the layer
and link neighboring layers. In III, hydrated Sr2+ cations and H2
Edta
– anions form a three-dimensional [Sr2(H2
Edta)(H2O)3]
n
2n+ framework. The Cl− anions are fixed in channels of the framework by hydrogen bonds with four water molecules. In II and III, the N-H groups form four-center N-H…O3 hydrogen bonds, which include one intermolecular and two intramolecular components. PACS numbers: 61.66.Hq
Original Russian Text ? I.N. Polyakova, A.L. Poznyak, V.S. Sergienko, 2009, published in Kristallografiya, 2009, Vol. 54,
No. 2, pp. 262–267. 相似文献
10.
Abstract
Hydrazinium complexes of Ce(III) and Eu(III) ethylenediaminetetra-acetate hydrates have been synthesized in aqueous solution and characterized by hydrazine and metal analyses, elemental analysis, infrared spectra, X-ray power diffraction and single crystal X-ray diffraction techniques. The CeIIIN2O7 parts in the complex anion has a pseudomono-capped square antiprismatic nine-coordinate structure, in which the six coordinated atoms (two N and four O) from the ethylenediaminetetraacetate ion and three water molecules are coordinated to the central rare earth metal ion directly. The EuIIIN2O7 part in the complex anion has the same structure as CeIIIN2O7 part. The crystal of the cerium complex belongs to the orthorhombic crystal system and Fdd2 space group. The crystal data are the follows: a = 19.7281(7) ?, b = 35.7790(11) ?, c = 12.3244(4) ?, α = β =γ = 90°, V = 8699.2(5) ?3. The final R and Rw are 0.020 and 0.0589 for with I > 2σ (I) and 3,842 reflections, respectively. The crystal of the europium complex is isostructural with the cerium complex. The crystal data of europium complex are: a = 19.7281(7) ?, b = 35.7790(11) ?, c = 12.3244(4) ?, α = β =γ = 90°, V = 8699.2(5) ?3. The final R and Rw are 0.0252 and 0.687 for with I > 2σ (I) and 3,842 reflections, respectively. The X-ray powder diffraction patterns and infrared spectra of the complex are super imposable indicating their structural similarity. 相似文献11.
L. B. Serezhkina A. V. Vologzhanina N. A. Neklyudova V. N. Serezhkin 《Crystallography Reports》2009,54(3):449-454
Single crystals of the compound K2[(UO2)4(O)2(OH)2(C2O4)(CH3COO)2(H2O)2]·2H2O (I) are synthesized, and their structure is investigated using X-ray diffraction. Crystals of compound I belong to the triclinic system with the unit cell parameters a = 7.6777(6) ?, b = 7.9149(7) ?, c = 10.8729(9) ?, α = 72.379(2)°, β = 86.430(3)°, γ = 87.635(2)°, V = 628.33(9) ?3, space group P
, Z = 1, and R
1 = 0.0323. The main structural units of the crystals are [(UO2)4(O)2(OH)2(C2O4)(CH3COO)2(H2O)2]2− chains, which belong to the crystal-chemical group A
4
M
23
M
22
K
02
B
201
M
21 (A = UO22+, M
3 = O2−, M
2 = OH−, K
02 = C2O42−, B
01 = CH3COO−, M
1 = H2O) of the uranyl complexes. The chains are formed by linking the centrosymmetric tetramers of the composition (UO2)4(O)2(OH)2(CH3COO)2(H2O)2 via tetradentate bridging oxalate ions. The uranium-containing groups are joined into a three-dimensional framework through
the electrostatic interaction with potassium cations and a system of hydrogen bonds, which are formed with the participation
of atoms involved in the composition of the water molecules, hydroxide ions, and uranyl ions.
Original Russian Text ? L.B. Serezhkina, A.V. Vologzhanina, N.A. Neklyudova, V.N. Serezhkin, 2009, published in Kristallografiya,
2009, Vol. 54, No. 3, pp. 483–487. 相似文献
12.
Zuzana Bujdo?ová Katarína Gy?ryová Milan Melník Marian Koman Jana Ková?ová 《Journal of chemical crystallography》2011,41(4):443-448
Abstract
Two ligand isomers [Zn{4-ClC6H3-2-(OH)COO}2(Menia)2(H2O)2] (I) and [Zn{5-ClC6H3-2-(OH)COO}2(Menia)2(H2O)2] (II) (Menia = N-methylnicotinamide) were prepared and characterized by elemental analysis, IR spectroscopy and thermal analysis. The X-ray crystal structures of complexes (I) and (II) were determined. Compound (I) crystallizes in the triclinic space group P[`1] P\bar{1} with a = 8.105(1) ?, b = 10.036(2) ?, c = 10.545(2) ?, α = 109.088(9)°, β = 91.416(8)°, γ = 102.757(9)°, V = 786.2(2) ?3, Z = 1. Compound (II) crystallizes in the triclinic space group P[`1] P\bar{1} . Its cell parameters are: a = 8.133(1) ?, b = 10.119(2) ?, c = 10.428(1) ?, α = 66.44(1)°, β = 74.32(1)°, γ = 80.16(1)°, V = 755.5(2) ?3, Z = 1. The molecular structure of both isomers is monomeric. Each Zn(II) atom is hexacoordinated by three pairs of unidentate ligands in trans-positions (ZnO4N2). The 5-Clsal complex is somewhat less distorted than 4-Clsal complex (Cl-sal = chlorosalicylate). The structural data are compared with those found in similar [Zn(RCOO)2(NL)2(H2O)2]. 相似文献13.
L. B. Serezhkina E. V. Peresypkina A. V. Virovets A. G. Verevkin D. V. Pushkin 《Crystallography Reports》2009,54(2):259-266
Single crystals of the compounds (C3N6 H7)4(CN3H6)2[UO2(CrO4)4] · 4H2O (I) and (H3O)6[UO2(CrO4)4] (II) are synthesized, and their structures are investigated using X-ray diffraction. Compound I crystallizes in the triclinic system with the unit cell parameters a = 6.3951(8) ?, b = 10.8187(16) ?, c = 16.9709(18) ?, α = 93.674(4)°, β = 97.127(4)°, γ = 92.020(4)°, space group, P
Z = 1, V = 1161.6(3) ?3, and R = 0.0470. Crystals of compound II belong to the monoclinic system with the unit cell parameters a = 14.3158(4) ?, b = 11.7477(3) ?, c = 13.1351(4) ?, β= 105.836(1)°, space group C2/c, Z = 4, V = 2125.2(1) ?3, and R = 0.0213. The uranium-containing structural units of crystals I and II are mononuclear anionic complexes of the composition [UO2(CrO4)4]6− with an island structure, which belong to the crystal-chemical group Am
14 (A = UO2+2, M
1 = CrO2−4) of the uranyl complexes. The [UO2(CrO4)4]6− anionic complexes are joined into a three-dimensional framework through the electrostatic interactions with outer-sphere
cations and a system of hydrogen bonds.
Original Russian Text ? L.B. Serezhkina, E.V. Peresypkina, A.V. Virovets, A.G. Verevkin, D.V. Pushkin, 2009, published in
Kristallografiya, 2009, Vol. 54, No. 2, pp. 284–290. 相似文献
14.
Jin-Min Li 《Journal of chemical crystallography》2009,39(2):128-130
Abstract Hydrated zinc perchlorate reacted with sodium azide and 1-(1,10-phenanthrolin-2-yl)-2-pyridone (L) in methanol solution and
resulted in the formation of a new binuclear complex: [Zn2(μ-N3)2(N3)2(L)2]. The complex has been characterized by elemental analysis and IR spectrum, and its crystal structure determined by X-ray
crystallography and the complex crystallizes in the monoclinic system with space group P21/c and a = 11.409(2), b = 8.0733(15), c = 18.163(3) Ǻ, β = 99.095(3)°. In the complex two azide anions act as bridge ligand and another two azide anion and two 1-(1,10-phenanthrolin-2-yl)-2-pyridone
function as terminal ligands, and Zn(II) ion lies in a distorted triangle bipyramid geometry.
Index Abstract The title binuclear Zn(II) complex was synthesized by zinc perchlorate, sodium azide and 1-(1,10-phenanthrolin-2-yl)-2-pyridone
and its crystal structure determined. Single crystal X-ray diffraction analysis reveals that azide anion function as both
bridge ligand and terminal ligand, and 1-(1,10-phenanthrolin-2-yl)-2-pyridone only acts as a terminal ligand. 相似文献
15.
Muhammad Altaf Helen Stoeckli-Evans Saeed Ahmad Anvarhusein A. Isab Abdul Rahman Al-Arfaj Muhammad Riaz Malik Saqib Ali 《Journal of chemical crystallography》2010,40(12):1175-1179
Abstract
The title compound was prepared by reacting mercury(II) cyanide and tetramethylthiourea (Tmtu) in the molar ratio of 1:1.75. It was characterized by IR and NMR (1H and 13C) spectroscopy, and X-ray crystallography. The appearance of a band around 2,200 cm−1 in IR and a resonance around 145 ppm in 13C NMR indicated the binding of cyanide to mercury(II). The crystal structure of the title complex, [{(tetramethylthiourea)2Hg(CN)2}2·Hg(CN)2] (1) consists of two independent [(Tmtu)2Hg(CN)2] moieties bridged by a Hg(CN)2 unit. The mercury atom in [(Tmtu)2Hg(CN)2] unit is coordinated to two thione sulfur atoms of Tmtu and to two cyanide carbon atoms in a distorted tetrahedral mode. 相似文献16.
Yun-Xia Lian Guo-Dong Yang Jing-Cao Dai Zhi-Yong Fu Xin-Tao Wu 《Journal of chemical crystallography》2009,39(1):60-67
Abstract Two new compounds, [Cd(tp)(H2O)3] · 4H2O (1) and [Ph4P][Cd (tp)0.5Cl2] · H2O (2) (tp = terephthalate, [Ph4P] = tetraphenylphosphonium), are metal-polycarboxylate coordination polymers prepared by similar hydrothermal synthesis techniques.
Both compounds crystallize in the 1D chain-like architectures. 1 (C8H18CdO11) is orthorhombic Pcca, Z = 4 (a = 7.3018(1) ?, b = 9.9975(3) ?, c = 19.9695(5) ?, V = 1457.77(6) ?3). 2 (C28H24CdCl2O3P) is triclinic P−1, Z = 2 (a = 9.5028(4) ?, b = 12.3130(5) ?, c = 12.7343(6) ?, α = 68.380(1)°, β = 73.723(1)°, γ = 89.624(1)°, V = 1321.8(1) ?3). Transition metal cadmium centers bridged by rigid linear tp ligands give rise to a 1D infinite zigzag chain polymer for
1 and a simple 1D infinite stepped chain polymer for 2. 1 presents an interesting plywood-like packing network while 2 shows a simple parallel rod-like stacking network. An intense fluorescent emission at 412 nm (λexc = 338 nm) for 1 in the solid state at room temperature is observed.
Index Abstract Polymeric compounds [Cd(tp)(H2O)3] · 4H2O (1) and [Ph4P][Cd (tp)0.5Cl2] · H2O (2) crystallize in two remarkable 1D chain-like architectures prepared by similar hydrothermal synthesis techniques, showing
an interesting plywood-like packing network in 1 and a simple parallel rod-like stacking network in 2, respectively. An intense fluorescent emission at 412 nm (λexc = 338 nm) for 1 in the solid state at room temperature is observed.
相似文献
17.
Amanda L. Peretich Donna S. Amenta John W. Gilje Glenn P. A. Yap 《Journal of chemical crystallography》2010,40(8):716-719
Abstract
Magnesium aluminum isopropoxide coordinates two solvent molecules when crystallized from dimethylformamide yielding the title compound, [Me2NCH(O)]2Mg[(μ-OPr i )2Al(OPr i )2]2, a potential CVD and sol–gel precursor of spinel, MgAl2O4: monoclinic, P21/c, a = 18.876(3) ?, b = 12.5225(19) ?, c = 18.578(3) ?, β = 108.333(2)°, V = 4168.6(11) ?3, Z = 4, Mg[(μ-OPr i )2Al(OPr i )2]2. 相似文献18.
L. B. Serezhkina E. V. Peresypkina A. V. Virovets A. G. Verevkin D. V. Pushkin 《Crystallography Reports》2009,54(1):63-67
Single crystals of the compound K8[(UO2)2(C2O4)2(SeO4)4] · 2H2O (I) are synthesized, and their structure is investigated using X-ray diffraction. Compound I crystallizes in the monoclinic system with the unit cell parameters a = 14.9290(4) ?, b = 7.2800(2) ?, c = 15.3165(4) ?, β = 109.188(1)°, V = 1572.17(7) ?3, space group P21/n, Z = 2, and R = 0.0297. The uranium-containing structural units of crystals I are dimers of the composition [(UO 2)2(C2O4)2(SeO4)4]8−, which belong to the crystal-chemical group AB
01
B
2
M
1 (A = UO22+, B
01 = C2O42−, B
2 = SeO42−, M
1 = SeO42−) of the uranyl complexes. The [(UO2)2(C2O4)2(SeO4)4]8− dimers are joined into a three-dimensional framework through electrostatic interactions with the outer-sphere potassium cations.
Original Russian Text ? L.B. Serezhkina, E.V. Peresypkina, A.V. Virovets, A.G. Verevkin, D.V. Pushkin, 2009, published in
Kristallografiya, 2009, Vol. 54, No. 1, pp. 68–71. 相似文献
19.
Abstract
The synthesis and crystal structure of the dinuclear manganese (II) compound [Mn2(bpy)4(2-ClC6H4COO)2](ClO4)2·2EtOH is described. The complex crystallizes in the monoclinic system, space group P21/n with a = 12.2067(18), b = 17.335(3), c = 13.706(3) ? and β = 92.606(8)°. In this structure, two manganese ions are bridged by two 2-chlorobenzoate ligands in a syn–anti mode. The hexa-coordination of each manganese is completed by two 2,2′-bipyridine ligands. Two perchlorate anions and two molecules of ethanol complete the packing. In order to check the magnetic properties previously reported from a powder sample, new magnetic studies have been carried out from a crystal sample, obtaining J = −1.79 cm−1 and g = 2.00 (H = −JS 1 ·S 2 ). 相似文献20.
Jing-Ping Wang Yue Shen Dong-Qin Bi Jing-Yang Niu 《Journal of chemical crystallography》2009,39(4):251-255
Abstract A novel dimeric compound H3.5[Ni(2,2′-bipy)3]3{[AlW12O40Ni(2,2′-bipy)2(H2O)]2Na0.5} prepared by the hydrothermal method consists of a {[AlW12O40Ni(2,2′-bipy)2(H2O)]2Na0.5}9.5− heteropolyanion, and in the anion, two reduced Keggin heteropolyanions [AlWVI
10W2VO40]7− are bridged via Na coordination ion by means of an O–Na1–O linkage (O atoms from the surface bridging oxygen atoms of [AlWVI
10W2VO40]7−) and two Ni coordination ions are linked to the Na1 square planar moiety by making use of Ni–Ow–Na1–Ow–Ni bridges. The crystal
belongs to the monoclinic-space group C2/c, a = 46.592(9), b = 14.306(3), c = 25.967(5) ?, β = 90.14(3)°, V = 17308(6) ?3, Z = 4, D
c
= 3.116 Mg/m3.
Index Abstract A novel dimeric compound H3.5[Ni(2,2′-bipy)3]3{[AlW12O40Ni(2,2′-bipy)2(H2O)]2Na0.5} prepared by the hydrothermal method consists of a {[AlW12O40Ni(2,2′-bipy)2(H2O)]2Na0.5}9.5− heteropolyanion, and in the anion, two reduced Keggin heterpolyanions [AlWVI
10WV
2O40]7− are bridged via Na coordination ion by means of an O–Na1–O linkage (O atoms from the surface bridging oxygen atoms of [AlWVI
10WV
2O40]7−) and two Ni coordination ions are linked to the Na1 square planar moiety by making use of Ni7–Ow7–Na17–Ow7–Ni bridges.
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