共查询到20条相似文献,搜索用时 15 毫秒
1.
The coordination chemistry of a series of 2,6- and 2,3-diarylpyrazines with copper(II) acetate is reported. The 2:2 coordination complexes formed between two 2,6-diarylpyrazines and copper(II) acetate are characterized by X-ray crystallography. The structure (2,6-bis(3,5-dimethylphenyl)pyrazine)copper(II) acetate acetonitrile solvate, (C48H52Cu2N4O8) (C2H3N) is triclinic, P 1, with a = 7.9685(10), b = 13.1893(16), c = 13.8267(17) Å, = 107.585(3)°, = 103.921(3)° and = 96.759(3)°. The structure of (2-(2,6-dimethylphenyl)-6-(3,5-dimethylphenyl)pyrazine)copper(II) acetate, C48H52Cu2N4O8, is monoclinic, P21/c, with a = 8.2196(7), b = 12.5174(11), c = 21.7325(19) Å and = 96.201(2)°. 相似文献
2.
Annamalai Subashini P. Thomas Muthiah Gabriele Bocelli Andrea Cantoni 《Journal of chemical crystallography》2007,37(9):597-600
The title compound, [C4H7N4O+, C7H5O6S? . H2O] contains one 2, 6-diamino-4-oxopyrimidinium cation, one sulfosalicylate anion and a water molecule. The crystal structure was determined by single crystal X-ray diffraction. This compound crystallized in the orthorhombic system; space group Pna21 with the unit cell parameters a = 13.402(3) Å, b = 16. 221(3) Å, c = 6.714(2) Å, V = 1459.6(6), Z = 4. The sulfonic acid group has protonated the aminopyrimidine moiety. The protonated N1 atom and N4 amino group are hydrogen bonded to the keto group (O1) of the neighbouring pyrimidine forming a six-membered ring with graph-set notation R2 1(6) and a supramolecular chain along the c-axis. This supramolecular chain is further strengthened by one of the sulfonate oxygen atoms (O3), bridging the pyrimidines via hydrogen bonded rings, R3 2(10) involving N(3)–H(3)···O(3) and N(2)–H(2B)···O(3) hydrogen bonds. The other two oxygen atoms of the sulfonate groups are bridged by water molecules via O-H···O hydrogen bonds constituting a supramolecular chain. The water molecule also acts as hydrogen bond acceptor with respect to the carboxyl group. 相似文献
3.
Zachary N. Pickett William A. Howard Christopher R. Graves 《Journal of chemical crystallography》2008,38(9):717-721
Abstract Two substituted pyridinium chloride salts, namely 4-chloro-2,6-bis(hydroxymethyl)pyridinium chloride (triclinic, P-1, a = 6.0651(8) ?, b = 8.4393(8) ?, c = 8.6554(9) ?, α = 78.845(1)°, β = 83.156(1)°, γ = 89.047(1)°; V = 431.55(8) ?3; Z = 2) and 4-dimethylamino-2,6-bis(hydroxymethyl)pyridinium chloride hemihydrate (orthorhombic, Aba2, a = 17.2179(14) ?, b = 17.6332(15) ?, c = 7.2068(6) ?; V = 2188.0(3) ?3; Z = 4), have been structurally characterized. Hydrogen bonding and van der Waals contacts are evident in both structures.
Furthermore, the 4-dimethylamino derivative features a trigonal planar dimethylamino group with some π interaction between
the nitrogen atom and the pyridine ring.
Graphical Abstract Two compounds, namely 4-chloro-2,6-bis(hydroxymethyl)pyridinium chloride and 4-dimethylamino-2,6-bis(hydroxymethyl)pyridinium chloride hemihydrate, have been spectroscopically and structurally characterized. 相似文献
4.
Abstract A novel aromatic polycarboxylate polymer, [Zn2(bipy)2(btec)(H2O)2]n (1), has been synthesized and structurally characterized by the single crystal X-ray diffraction. Compound 1 belongs to the triclinic crystal system, space group P-1; a = 7.7449(6) ?, b = 8.9286(8) ?, c = 10.7422(8) ?, α = 80.95(1)°, β = 70.21(1)°, γ = 78.14(1)°, V = 680.93(10) ?3, Z = 2. The coordination geometry of Zn(II) atom is distorted trigonal bipyramidal with two nitrogen atoms of one 2,2′-bipy
group, two oxygen atoms from two different btec ligands, and one water. The 16-membered rings are alternately arranged forming
an infinite 1-D double-chain structure. A 3-D network was constructed by interlayer C···H–O, O···H–O hydrogen bonds and π–π
stacking interactions. Compound 1 exhibits fluorescence at room temperature in the solid state.
Graphical Abstract A 1-D double-chain aromatic polycarboxylate polymer, [Zn2(bipy)2(btec)(H2O)2]n (1), has been synthesized and structurally characterized by the single crystal X-ray diffraction. A 3-D network was constructed
by intermolecular C···H–O, O···H–O hydrogen bonds and π–π stacking interactions. Compound 1 exhibits fluorescence at room temperature in the solid state.
相似文献
5.
Tarun Kumar Misra Jack Cheng Tian-Huey Lu Fen-Ling Liao Chung-Sun Chung 《Journal of chemical crystallography》2008,38(10):801-806
Abstract A new isomer of [Ni(tet-a)]2+ (assigned as γ-isomer) (tet-a = C-meso-5,5,7,12,12,14−hexamethyl-1,4,8,11-tetraazacyclotetradecane), which is found in the complex of trans-γ-[Ni(tet-a)(NCS)2], has been isolated from the reaction of β-[Ni(tet-a)](ClO4)2 with NaSCN in a mixture of MeOH–H2O (1:1, v/v) solution and characterized by X-ray crystallography. The complex crystallizes in orthorhombic Pca2(1) space group with the crystal cell parameters of a = 12.5787(10) ?, b = 11.6834(10) ?, c = 15.4019(12) ?, V = 2263.5(3) ?3, and Z = 4. The crystal structure shows that the complex is noncentrosymmetric. The conformations of the six-asymmetric centers
are assigned as 1R,4R,8S,11S,7R,14S or 1S,4S,8R,11R,7S,14R (Trans-III). The coordination polyhedron around the nickel atom is axially elongated octahedron with an N6 chromophore. The association of the complex units through N(3)–H···S(1) (2.665 ?) hydrogen bonding interactions leads one-dimensional
hydrogen bonded network along c-axis.
Index Abstract A new isomer of Ni(tet-a)2+, which is assigned as γ-isomer, in the complex of trans-γ-[Ni(tet-a)(NCS)2] has been synthesized, isolated and characterized by X-ray crystallography. The complex units form a one-dimensional self-assembly
hydrogen bonded network.
相似文献
6.
Kusum Bania Nilotpal Barooah Rupam Sarma Jubaraj Bikash Baruah 《Journal of chemical crystallography》2008,38(1):57-60
Abstract The crystal structure of a metallohybrid carboxylic acid obtained from the reaction of 1,3,5-benzenetricarboxylic acid (TCAH3)
with copper(II)acetate monohydrate in the presence of pyridine (py) having composition Cu(py)2(TCAH2)2(H2O)2 [1] is reported. It crystallizes in triclinic space group P-1 and with a = 7.0110(3)?, b = 8.9523(5)?, c = 11.5370(5) ?,
α = 79.776(3) °, β = 82.881(3)°, γ = 83.628(3)°, and V = 704.18(6)?3. The hydrogen bond in 1 is compared with the hydrogen bond pattern in the structure of 1,3-dicarbomethoxy 4,6-benzenedicarboxylic
acid, which crystallizes in mononclinic space group P21/c and has unit cell parameters of a = 6.9549(16)?, b = 8.7676(15)?,
c = 20.111(4)?; β = 92.585(17) ° and V = 1225.1(4) ?3.
Index Abstract Crystal structure of a metallohybrid carboxylic acid obtained from the reaction of 1,3,5-benzenetricarboxylic acid with copper(II)acetate
monohydrate in the presence of pyridine is determined and compared with hydrogen bond pattern present in the structure of
1,3-dicarbomethoxy 4,6-benzenedicarboxylic acid.
Crystal structure of a metallohybrid acid of 1,3,5-benzenetricarboxylic acid of copper(II).
Kusum Bania, Nilotpal Barooah, Rupam Sarma, Jubaraj B. Baruah 相似文献
7.
Abstract The title compound, [CdCl2(C5H6N2OS)]
n
, crystallizes in the polar space group R3c with the crystal cell parameters a = 23.363(3) ?, c = 9.5560(19) ?, V = 4,478.4(13) ?3 and Z = 18. Each cadmium is coordinated to four bridging chloro ligands, the carbonyl oxygen and the terminal nitrogen atom of
a 2-thenoylhydrazine ligand. The chelating coordination by the latter moiety implies a distorted cis octahedral arrangement around the metal center. The resulting helical polymer chains in the direction of the crystallographic
c axis are cross-linked by the N–H···O hydrogen bonds to a three-dimensional network.
Index Abstract
catena-Bis(μ-chloro)-(κ-O, κ-N-{2-thenoylhydrazine})-cadmium(II) crystallizes in the polar space group R3c as a helical polymer which expands along the c axis. 相似文献
8.
K. Ravikumar B. Sridhar M. Mahesh V. V. Narayana Reddy 《Journal of chemical crystallography》2006,36(6):381-387
The crystal structures of isoxazole, 3-[[dihydro-2-[(Z)-2-oxohyrazono]-1H-imidazol-1-(3H)-yl]methyl-5-phenyl-,N-oxide] (C13H13N5O3) (I), isoxazole,3-[[dihydro-2-[(Z)-2-oxohyrazono]-1H-imidazol-1-(3H)-yl]-methyl-5-(4-methylphenyl)-,N-oxide] (C14H15N5O3) (II) and isoxazole, 3-[[dihydro-2-[(Z)-2-oxohyrazono]-1H-imidazol-1-(3H)-yl]-methyl-5-(2-methoxyphenyl)-,N-oxide] (C14H15N5O4) (III) have been determined by X-ray diffraction studies. The compound I, crystallized in triclinic space group with unit cell dimensions a = 7.2405(7) ?, b = 7.9936(8) ?, c = 11.6573(11) ?, α = 97.801(2)°, β = 90.884(2)°, γ = 96.250(2)° and Z = 2. Compound II crystallized in orthorhombic space group Pna21 with unit cell dimensions a = 10.1778(10) ?, b = 28.228(3) ?, c = 5.1206(5) ?, and Z = 4. Compound III crystallized in monoclinic space group P21/n with unit cell dimensions a = 7.8439(9) ?, b = 7.8544(9) ?, c = 23.534(3) ?, β = 99.464(2)° and Z = 4. For all three compounds, the five-membered imidazolidine ring adopts an envelope conformation. The crystal structures are stabilized by both the intramolecular N–H···O and intermolecular N–H···N hydrogen bonding. 相似文献
9.
E. B. Seena M. R. Prathapachandra Kurup E. Suresh 《Journal of chemical crystallography》2008,38(2):93-96
Abstract The crystal structure of salicylaldehyde N(4)-phenyl thiosemicarbazone is described. The compound crystallizes in the triclinic crystal system, space group P
Z = 6, V = 2002.1(5) ?3 with unit cell parameters a = 10.6733(15) ?, b = 13.8856(19) ?, c = 14.052(2) ?, α = 81.851(2)°, β = 77.061(2)° and γ = 83.482(2)°. There are three independent molecules in the asymmetric unit. The crystal structure reveals that the compound
exists in the thione form and S1 and N3 are at E configuration to each other with respect to N2–C7 bond. Similarly, S2 and N6 are trans to each other with respect to N5–C21
bond in the second molecule of the asymmetric unit and S3 and N9 are trans to each other with respect to N8–C35 bond in the
third molecule of the asymmetric unit. The packing of the molecules in the crystal lattice is stabilized by intermolecular
hydrogen bonds.
Index Abstract The compound salicylaldehyde N(4)-phenyl thiosemicarbazone crystallizes in the triclinic crystal system, space group P
Z = 6, V=2002.1(5) ?3 with unit cell parameters a = 10.6733(15) ?, b = 13.8856(19) ?, c = 14.052(2) ?, α = 81.851(2)°, β = 77.061(2)° and γ = 83.482(2)°.
The structure of the compound salicylaldehyde N(4)-phenylthiosemicarbazone 相似文献
10.
采用螺旋波等离子体辅助射频磁控溅射技术,在α-Al2 O3衬底上制备了N-Al共掺ZnO薄膜样品.Hall测量表明室温下ZnAlO∶N薄膜为n型传导,在O2等离子体气氛中550℃退火后变为p型.p型ZnO薄膜的载流子浓度为2.1×1016 cm-3,霍尔迁移率为5 cm2/V·s.用X射线光电子能谱仪(XPS)对退火前后的ZnO薄膜进行了各元素的化学态分析.XPS结果表明,ZnAlO∶N薄膜中存在两种与N元素有关的缺陷,N原子替代O位形成的(N)o和N分子替代O位形成的(N2)o.退火后ZnAlO∶N薄膜中(N2)o缺陷减少,(N)o缺陷浓度占优导致了薄膜传导类型转变. 相似文献
11.
Xuda Wang Yunhe Xu Xueyan Song Licun Li Daizheng Liao Zonghui Jiang Shiping Yan 《Journal of chemical crystallography》2007,37(10):651-654
A novel iron (II) complex of formula [Fe3(2,2′-bipy)6(ox)3]·12.25H2O (2,2′-bipy = 2,2′-bipyridine, ox = oxalate) has been prepared and structurally characterized by X-ray crystallography. In the complex, the metal atoms are six-coordinated in distorted octahedral environment. In the complex [Fe(ox)3]4? anions and water molecules are linked together into 1D chain structure by hydrogen interaction. The red crystal of the complex is monoclinic, space group P21/c, with a = 22.932(6) Å, b = 13.715(4) Å, c = 22.493(6) Å, β = 93.177(5)°, and V = 7063(3) Å3 with Z = 4. 相似文献
12.
E. B. Seena B. N. Bessy Raj M. R. Prathapachandra Kurup E. Suresh 《Journal of chemical crystallography》2006,36(3):189-193
The crystal structure of 2-hydroxyacetophenone N(4)-cyclohexyl thiosemicarbazone is described. The compound crystallizes in the triclinic crystal system, space group , Z = 4, V = 1569.6(3) ?3 with unit cell parameters a = 6.9436(8) ?, b = 12.4762(15) ?, c = 18.588(2) ?, α = 100.187(2)°, β = 97.069(2)° and γ = 92.340(2)°. There are two independent molecules in the asymmetric unit. The crystal structure reveals that the compound exists in the thione form and S1 and N1 are at E configuration to each other with respect to N2-C8 bond. Similarly, S2 and N4 are trans to each other with respect to N5-C23 bond in the second molecule of the asymmetric unit. The packing of the molecules in the crystal lattice is stabilized by intermolecular hydrogen bonds. 相似文献
13.
Elif Gungor 《Molecular Crystals and Liquid Crystals》2017,642(1):21-28
A new copper complex trans-Dichlorobis[4-methoxypyridine]copper(II) (1) was synthesized and its crystal structure determined by X-ray diffraction. The close Cu···Cl contacts between the molecular units form bi-bridged dimers. The Copper(II) ion completes its 4 + 2 coordination via interaction with the Cu···Cl close contact. The complex has a polymeric structure of infinite one-dimensional (1D) bi-bridged chains, consisting of six-coordinate copper(II) units. C–H···C l intermolecular interaction connect the 1D-chains in the structure of 1 which form to 3D structure. The π ··· π interactions between the aromatic rings are also observed in the hydrogen bonded assembly of 1. 相似文献
14.
Highly oriented strontium barium niobate (SBN) thin films have been grown on MgO {100}substrates by pulsed laser deposition. The films have been characterised by X-ray diffraction (XRD), scanning electron microscopy and atomic force microscopy. XRD theta - 2 theta scans indicate that the single phase crystalline SBN layers with the {001} orientation perpendicular to the plane of the substrate . Because of the difference between the thermal expansion coefficients of the SBN thin film and the MgO {100} substrate, it is necessary to adapt a slow cooling rate after deposition to retain the highly oriented SBN thin film on the substrate. The presence of non-uniform residual strain in SBN thin film has been analysed from broadening of the (00l) SBN film diffraction lines. The influence of oxygen partial pressure on the crystalline properties of SBN thin films have also been investigated. 相似文献
15.
A. Szczerbakow Z. Golacki J. Z. Domagala R. Minikayev P. Dziawa A. Reszka B. J. Kowalski 《Crystal Research and Technology》2010,45(9):895-898
Cd0.2Zn0.8Te monocrystals with the sizes of about 15 mm have been produced by self‐selecting vapour growth (SSVG). High degree of structural perfection of monocrystalline Cd0.2Zn0.8Te was achieved. Excellent compositional uniformity was observed as well. To our knowledge, no comparable results are reported for this solid solution. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
16.
Periasamy Devi P. Thomas Muthiah Gabriele Bocelli Andrea Cantoni 《Journal of chemical crystallography》2006,36(12):857-861
The crystal structure of the compound bis [2,4-diamino-5-(p-chlorophenyl)-6-ethyl pyrimidinium hydrogen sulfate] monohydrate was studied by X-ray diffraction methods. The compound crystallises in orthorhombic system, space group P212121, a=18.531(2) ?, b=16.190(2) ?, c=10.777(2) ?, V=3233.3(8), Z=4. The asymmetric unit shows the presence of two crystallographically independent pyrimethamine molecules, two hydrogen sulfate anions, and a water molecule. The hydrogen sulfate anions form a cyclic hydrogen bonded motif R2
2(8) with the 2-amino pyrimidine of the respective protonated pyrimethamine cations, through N–H···O hydrogen bonds. Thus the sulfate anions mimic the role of carboxylate anions observed in many aminopyrimidine-carboxylate interactions. This motif self assembles through DDAA array of quadruple hydrogen bonds, N–H···Cl, O–H···O and C–H···O hydrogen bonds.Supplementary material CCDC-293607 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge at www.ccdc.cam.ac.uk/conts/retrieving.html [or from the Cambridge Crystallographic Data Centre (CCDC), 12 Union Road, Cambridge CB2 IEZ, UK; fax: C44 (0) 1223-336033; e-mail: deposit@ccdc.cam.ac.uk]. 相似文献
17.
Qi-Hua Zhao Li-Cun Li Zong-Hui Jiang Dai-Zheng Liao Shi-Ping Yan Rui-Bin Fang 《Journal of chemical crystallography》2004,34(3):191-194
A novel compound formed by copper(II) and a carboxy-substituted nitronyl nitroxide of formula [Cu2(NITpBAH)2Cl4] (NITpBAH = [2-(4-carboxy-phenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl-3-oxide]) has been synthesized. The compound crystallizes in the monoclinic space group P21/c with a = 9.5464(10), b = 12.4501(12), c = 14.3627(14) Å, = 95.200(2)°, and Z = 2. X-ray analysis reveals [Cu2(NITpBAH)2Cl4] units to be linked into infinite chains by radical bridging ligands with N
O of nitronyl nitroxide and substituted carboxy; there are the weak hydrogen bond interactions between chains. 相似文献
18.
本文采用尿素沉淀法合成了粒径约160 nm的激光陶瓷用氧化钇粉微球.颗粒呈较规则球形,单分散性良好.通过对反应过程的系统研究,探讨了粉体前驱体微球的生长机理,并研究了硫酸铵对前驱体微球生长习性的影响.对前驱体微球的热力学性质进行了研究.采用X射线衍射仪,扫描电镜,透射电镜,TG-DTA等仪器对实验过程及实验结果进行表征和分析.得出了溶液升温速率和硫酸铵对于氧化钇粉体制备的影响.较高的升温速率有助于前驱体颗粒在较短的时间内聚集.5;硫酸铵的加入明显减小前驱体尺寸,且硫酸根在1000℃煅烧时分解防止氧化钇微球之间出现烧结颈.从而形成外形规则、单分散的氧化钇微球. 相似文献
19.
直流电弧等离子喷射CVD中控制生长(111)晶面占优的金刚石膜 总被引:1,自引:1,他引:1
运用光发射谱(OES)技术对大功率直流电弧等离子喷射CVD金刚石膜的气相沉积环境进行了原位诊断,研究了气相环境中主要含碳基团的浓度及分布与沉积参数的关系,发现了C2基元比其他基元对沉积参数更加敏感.利用光发射谱对C2基元发射强度的监测,实时调控沉积各参数,在大功率直流电弧等离子喷射CVD中实现了(111)晶面占优的金刚石膜的可控生长,I(111)/I(220)XRD衍射峰强度的比值达48. 相似文献
20.
The X-ray crystal structure of the complex formed between 1,2-bis(2′-pyridylethynyl) benzene and mercuric(II) chloride is described. The complex (C40H24Cl6Hg3N4) crystallized in the triclinic space group P-1 with a=9.0414(6), b=9.4631(7), c=12.1134(9) ?, α=97.4680(10), β=94.8130(10), γ=105.4700(10)°. The structure reveals that the ligand is distorted from planarity to accommodate the mercury cation and a third mercuric chloride moiety is held between two ligand-mercury coordination complexes. The central mercury cation has octahedral coordination geometry surrounded by six chlorides while the other two mercury cations have distorted tetrahedral geometry each coordinated by two pyridyl nitrogen atoms and two chlorides. 相似文献