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1.
《Polyhedron》1986,5(9):1487-1488
Crystals of the complex Ni(NCS)2 · 2Ph3P are triclinic with a = 7.939(4) Å, b = 10.457(5) Å, c = 11.474(5) Å, α = 111.08(3)°, β = 74.56(3)° and γ = 92.25(3)°. X-ray data for 2692 independent observed reflections were collected and the structure determined by Fourier methods and refined to R = 0.038. The nickel geometry is square planar with the triphenylphosphine ligands occupying trans positions. A feature of the structure is the large value (173.3°) for the NiNC angles. 相似文献
2.
Q.-S. Ye M.-J. Xie X.-N. Li W.-P. Liu J. Yu Q.-W. Chang J. Jiang C.-X. Yan J. Li 《Journal of Structural Chemistry》2016,57(4):845-848
Di-μ-amido-bis[diammineplatinum(II)] nitrate (1) was synthesized as a byproduct during preparation of tetraammineplatinum(II) nitrate. One possible pathway to produce 1 is that [(H3N)2Pt(μ- OH)2Pt(NH3)2](NO3)2, a well-known complex forming on treatment of cis-Pt(NH3)2I2 with AgNO3, reacts with aqueous ammonia. The other possible pathway involves deprotonation of [Pt(NH3)4](NO3)2 to form monomeric Pt(NH3)3(NH2)NO3 followed by elimination of NH3. Crystals of 1 (from water) are monoclinic (C2/c) with a = 16.834(2) Å, b = 10.573(1) Å, c = 7.415(1) Å, β = 114.846(1)°, and Z = 4. The cationic portion consists of two symmetrical square-planar Pt centers with the inversion center at the midpoint of the Pt(1)???Pt(1A) vector. The Pt(II) ion is coordinated by four N atoms from two ammonia molecules and two bridging amido groups affording a slightly distorted square. The molecules are stacked in such a way that the planes of coordination squares turn out to be parallel to each other with a distance of 3.501 Å. Intermolecular Pt–H interaction between the μ-NH2 hydrogens and the platinum(II) centers of the adjacent molecule are observed. 相似文献
3.
4.
《Journal of organometallic chemistry》1987,333(3):323-327
An X-ray diffraction study has shown that Sn atoms in octabutyl-μ-dichloro-μ3-dioxodichlorotetratin(IV) have distorted trigonal bipyramidal geometry with cis-equatorial butyl groups. Sn(1)C(but) and Sn(2)C(but) bonds are 2.077(21), 2.111(26) and 2.097(23), 2.114(22) Å, respectively. The distances of the triply-bridging O atom from Sn atoms are 2.151(9), 2.018(9) and 2.069(9) Å, and those of the bridging Cl atom are 2.666(5) and 2.831(6) Å. The distance Cl(term)Sn(2) is 2.426(5) Å. Refinement of the structure, based on 1828 observed reflections, converged to an R factor of 0.049 and a weighted R of 0.053. Crystal data for the compound are: a 13.672(6), b 19.529(9), c 8.999(2) Å, β 102.66(3) °, space group P21/c, Z = 2, Mr = 1105.49 for [Sn4(C4H9)8Cl4O2], V 2344(2) Å3, Dx 1.464 gcm−3, F(000) = 1096, λ(Mo-Kα) 0.71069 Å,μ 22.1 cm−1 and T 293 K. 相似文献
5.
Jianggao Mao Zhongsheng Jin Jiazuan Ni 《Journal of inclusion phenomena and macrocyclic chemistry》1993,16(3):267-272
The title complex was prepared by reacting Yb(NO3)3 (12-crown-4) with 1,10-phenanthroline (hereafter phen) in acetone. It crystallized in the triclinic space group
witha=10.095(5),b=17.415(4),c=8.710(2) Å =92.45(2), =115.83(3), =74.08(3)0 andD
c=1.85 g cm–3;Z=2. The metal ion in this complex is nine-coordinated to three bidentate nitrate ions, two nitrogen atoms of a phen and a water molecule. The crown ligand is hydrogen bonded to the coordination water molecule. The symmetry change of the crown ether is also discussed.
Supplementary Data relating to this article are deposited with the British Library as Supplementary Publication No. 82158 (27 pages). 相似文献
6.
A single crystal X-ray diffraction study of Na3[Rh(SO3)3(NH3)3]·6H2O was carried out (X8 APEX BRUKER automated diffractometer, MoK α radiation, graphite monochromator); crystal data are a = 10.1844(1) Å, c = 64.0815(13) Å, V = 5756.17(14) Å3, space group R $\bar 3$ c, Z = 12. The general motif of the structure was analyzed in terms of the mutual spatial arrangement of the [(NH3)3Rh(SO3)3-Na-(SO3)3Rh(NH3)3]5? fragments, where the Na+ cation is surrounded by six oxygen atoms belonging to six SO3 groups. This cation resides on the inversion center, all Na-O distances are identical, 2.347 Å. The selected fragments follow the nodes of a rhombohedral sublattice (a c = 12.19 Å, αc = 49.38°) formed by the intersection of three symmetry-related families of planes (1 0 2). 相似文献
7.
A new radical-cation salt β-(DOET)4CuBr4·PhCl (DOET = (1,4-dioxanediyl-2,3-dithio)ethylene-dithiotetrathiafulvalene) is synthesized by electrocrystallization in the dc mode (I = 0.12 μA), and its structure is studied. In the structure of the salt, the DOET radical cations are packed in layers parallel to ab. The average charge on DOET is equal to +0.5. The dioxane rings and ethylene groups of DOET, the tetrahedral CuBr 4 2? -anion, and the chlorobenzene molecules are each disordered over two positions with a 50% probability, and the chlorine atoms of chlorobenzene are disordered over four positions with a 25% probability. The salt has semiconducting properties (E a = 55 meV). 相似文献
8.
9.
Two new dimethylglyoximate complexes [Co(DmgH)2(Im)Cl] (I) and (ImH)[Co(DmgH2)2Cl2] (II), where DmgH? is the dimethylglyoxime residue and Im is the imidazole molecule, are synthesized. The composition and structure of the crystals are determined from the elemental analysis, IR spectra, and single crystal X-ray diffraction. Complex I is molecular, containing the Im molecule as a coordinated ligand; complex II is of the ionic type with (ImH)+ involved as an outer-sphere organic cation. The mode of component packing in the crystals mainly depends on the imidazole position in the compounds. 相似文献
10.
The molecule (η5-pentamethylcyclopentadienyl)(methyldiphenylphosphinite-P)dichlororhodium(III), [(η5-C5Me5)RhCl2(PPh2OMe)], crystallizes in the monoclinic crystal system in space group P21/c with unit cell parameters a = 16.056(3) Å, b = 9.4331(18) Å, c = 15.745(3) Å, β = 108.330(4)°, V = 2263.8(7) Å3 and Z = 4. There is three-legged piano stool geometry about Rh. The Rh-P distance of 2.278(2) Å is shorter than those of [(η5-C5Me5)RhCl2(PPh2OR)] where R is an aryl group, and longer than those found in [(η5-C5Me5)RhCl2{PPh(OR)2}]. The structure reveals significant distortion of the pentamethylcyclopentadienyl towards ′η3,η2-enyl-ene′ coordination. 相似文献
11.
1 INTRODUCTION Tri-butyl phosphate (TBP) has been widely used for the extraction reagent in Th-U fuel to separate uranium from thorium. However di-butyl phosphate (DBP) and butyl phosphate (MBP), the radiolytic products of TBP, exhibit some coordinated ability to the fission elements, such as Zr and Nb. The physical and chemical properties of amides and caprolactam are similar to those of TBP, and they selectively extract U(VI) and Th(VI). The principal advantages of amides an… 相似文献
12.
V. V. Tatarchuk A. P. Sergievskaya N. V. Kuratieva I. V. Korol’kov L. A. Sheludyakova S. A. Gromilov 《Journal of Structural Chemistry》2014,55(1):142-146
The crystals of the [Pd3(μ-OH)(μ-CH3COO)5] complex are obtained and characterized using powder and single crystal X-ray diffraction and IR spectroscopy. The crystal structure (a = 15.6942(6) Å, b = 11.7190(3) Å, c = 9.7871(3) Å, V = 1800.05(10) Å3, space group Pna21, Z = 4) is formed from neutral trinuclear cyclic molecules of [Pd3(μ-OH)(μ-CH3COO)5], in which the OH? group, together with five CH3COO? anions, is a bridge ligand. 相似文献
13.
E. E. Baeva A. V. Virovets E. V. Peresypkina L. B. Serezhkina 《Russian Journal of Inorganic Chemistry》2006,51(2):220-228
The complex Na6[(UO2)3O(OH)3(SeO4)2]2 · 10H2O (I) is synthesized and studied by X-ray diffraction. The compound crystallizes in the orthorhombic crystal system with the unit cell parameters: a = 14.2225(7) Å, b = 18.3601(7) Å, c = 16.5406(6) Å, V = 4319.2(3) Å3, Z = 4, space group Cmcm, R 1 = 0.0406. Compound I is found to be a representative of the crystal-chemical group A3M3M2 3T3 2 (A = UO2+ 2, M3 = O2?, M2 = OH?, T3 = SeO2? 4) of the uranyl complexes; it contains layer uranium-containing groups [(UO2)3O(OH)3(SeO4)2]3?. These layers linked to form a three-dimensional cage through bonds formed by the sodium atoms with the oxygen atoms of the uranyl ions and SeO4 groups that belong to different layers. 相似文献
14.
A. S. Antsyshkina G. G. Sadikov S. A. Syrbu M. N. Rodnikova M. R. Kiselev V. A. Burmistrov S. A. Kuvshinova A. A. Syrbu 《Russian Journal of Inorganic Chemistry》2011,56(11):1800-1811
The molecular and crystal structures of N≡C-C6H4-C6H4-O-(CH2)8-O-CO-CH=CH2 (4(3-acryloyloxy)octyloxy-4′-cyanobiphenyl) (I) and N≡C-C6H4-C6H4-O-(CH2)6-O-CO-CH=CH2 (4(3-acryloyloxy)hexyloxy-4′-cyanobiphenyl) (II) were determined by X-ray diffraction. The structures of I and II are stereotype. The space group of I and II is C2/c, Z = 8; lattice parameters I: a = 34.677(7)?, b = 9.452(2)?, c = 13.004(3) ?, β = 99.30(3)°; II: a = 30.858(6) ?, b = 9.504(2) ?, c = 13.082(2) ?, β = 92.78(3)°. The planar extended molecules I and II are packed in the unit cell to give clearly differentiated aliphatic and aromatic regions throughout the whole crystal. All
intermolecular contacts are concentrated in the aromatic region. The molecular packing is very loose but the aromatic areas
of I and II fully coincide. The only free parameter of the structure is the length of the aliphatic chain (CH2)n (n = 8 and 6). According to DSC data, compound I possesses enantiotropic mesomorphism and II possesses monotropic mesomorphism. 相似文献
15.
《Journal of solid state chemistry》1986,65(2):260-264
The VO2F3−4 ion has a cis octahedral structure, as is shown by single crystal structure analysis of the title compound. The unit cell of (NH4)3VO2F4 (space group Immm or I222, a = 912.6(2), b = 1881.8(4), c = 626.4(1) pm, Z = 6) contains two symmetrically independent anions. One is rotationally disordered. Oxo and fluoro ligands cannot be distinguished. But the second one has a distorted cis octahedral structure with the lengths 170.0(4), 186.1(4), and 202.3(4) pm for the VO, VF (axial), and VF (equatorial) bonds. Infrared and Raman spectra as well as theoretical considerations support the crystallographic results. The phase transitions at 418 and 215 K were confirmed by variable temperature X-ray powder diffraction. Above 418 K the cubic cryolite type structure is adopted with a = 902.6(2) pm. Plausible mechanisms for the phase transitions are suggested. 相似文献
16.
The crystal structures of two uranyl nitrate complexes with 2,2′-6,2″-terpyridine (Trpy), [(UO (Trpy)-[(UO2)2(Trpy)2(OH)2][UO2(NO3)2(OH)2] · 2CH3OH (I) and [(UO2)2(Trpy)2(OH)2]2[UO2(NO3)3(H2O)](NO3)3 · 3H2O (II), were studied. Compound I consists of the centrosymmetric dimeric cations [(UO2)2(Trpy)2(OH)2]2+, the anions [UO2(NO3)2(OH)2]2?, and solvation methanol molecules. Complex II consists of dimeric cations [(UO2)2(Trpy)2(OH)2]2+, the complex anions [UO2(NO3)3(H2O)]?, nitrate anions, and water molecules of crystallization. The uranium atom in the [UO2(NO3)3(H2O)]? anion in II has an unusual coordination polyhedron representing a hexagonal bipyramid in which one oxygen atom in the equatorial plane is replaced by two atoms equidistant from this plane. 相似文献
17.
A. V. Anyushin M. N. Sokolov A. V. Virovets V. P. Fedin 《Journal of Structural Chemistry》2013,54(3):638-641
[Pt3S2(P(CH2OH)3)6](PF6)(OH)·H2O (1) is obtained by a reaction of [Pt3S2(P(CH2OH)3)6]Cl2 with NH4PF6. The crystal structure of 1 was determined by a single crystal X-ray diffraction analysis (space group R{ie638-1}c, a = 12.0042(2) Å, c = 52.6879(11) Å, V = 6575.2(2), Z = 6, C18H57F6O20P7Pt3S2, d x = 2.385 g/cm3, T = 150 K, R 1 = 0.044 for 2123 F 0 > 4δ(F) until 2θmax = 63°). The cations contain a {Pt3(μ3-S)2}2+ core with nonbonding Pt…Pt distances of 3.1536(6) Å. The Pt atoms are in a square planar environment; the Pt-S and Pt-P bond lengths are 2.3586(16) Å and 2.260(2) Å respectively. 相似文献
18.
By single crystal X-ray diffraction the crystal structure of the complex salt [Co(NH3)5Cl]2(W10O32)·4H2O is determined and the IR spectrum is interpreted. The crystal chemical analysis of the structure of complex cations and decatungstate anions and their packing in the structure is performed. 相似文献
19.
I. A. Litvinov O. N. Kataeva G. I. Kovylyaeva V. E. Kataev 《Russian Chemical Bulletin》1991,40(8):1604-1606
In continuation of previous studies [1] on structures of compounds differing from acetylcholine and choline by having a pyridine ring instead of the quaternary N atom, the x-ray structure of N-(-acetoxyethyl)-4-methylpyridinium bromide, which has cholinergic activity [2], is solved.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1813–1816, August, 1991. 相似文献
20.
A dimeric [{Fe(5-ClL1)}2(μ-O)], [H2-5-ClL1 = N,N′-bis(5-chloro-2-hydroxybenzylidene)-2-methylpropane-1,2-diamine] tetradentate Schiff-base complex, 1, has been synthesized and its crystal structure has been determined by single crystal X-ray diffraction analysis. Structural analysis of complex 1 shows that the complex is a centrosymmetric dimer. Each of the Fe(III) ions has a five-coordinate geometry and one oxygen atom bridges two Fe(III) ions to form a μ-oxo structure. The geometry around iron atom can be described as a square based pyramid with the FeN2O2 coordination plane and oxo ligand. 相似文献