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  • 1. Belombe, M. M.
    et al.
    Nenwa, J.
    Wankap Kouamo, J. S. T.
    Ponou, S.
    Fischer, Andreas
    KTH, Skolan för kemivetenskap (CHE), Kemi, Tillämpad fysikalisk kemi.
    catena-Poly[[[(oxamide dioxime-kappa N-2,N ')copper(II)]-mu-L-tartrato-kappa O-4(1),O-2:O-3,O-4] tetrahydrate]: a chiral nanochannel framework hosting solvent water molecules2012Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 68, nr 5, s. m131-m134Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The crystal structure of the title compound, {[Cu(C4H4O6)(C2H6N4O2)].4H2O}n, contains the central CuII cation in a distorted octahedral coordination, symmetrically chelated by the two imine N atoms of a neutral oxamide dioxime (H2oxado) ligand [CuN = 1.9829 (16) angstrom] and unsymmetrically bis-chelated by two halves of the l-(+)-tartrate(2-) (tart) ligands, each half being linked to the CuII cation via the deprotonated carboxylate group and protonated hydroxy group [CuO = 1.9356 (14) and 2.4674 (13) angstrom, respectively]. The extended asymmetric unit is defined by twofold axes, one passing through the CuII cation and the centre of the oxamide dioxime (H2oxado) ligand and the another two (symmetry related) bisecting the central CC bonds of the tartrate ions. The structure is chiral, consisting of enantiomeric linear-chain polymers oriented along [001], with virtual monomeric {Cu(tart0.5)2(H2oxado)} repeat units and with the chains interleaved face-to-face into `twin pillars'. Nanochannels exist, running parallel to the c axis and bisecting a and b, which host `double strings' of solvent water molecules. Extensive hydrogen bonding (OH...O and NH...O) between the chains and solvent water molecules, together with extended ps interactions, consolidate the bulk crystal structure.

  • 2.
    Boström, Dan
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten.
    Strandberg, R
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten.
    Norén, B
    Oskarsson, Å
    CIS-Trans Influences on Square-Planar Platinum(II) Complexes: Structure of CIS-BIS (Dimethyl Sulfoxide) Dinitratoplatinum (II)1991Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 47, s. 2101-2104Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    cis-[Pt{(CH3)2SO}2(NO3)2], M(r) = 475.36, monoclinic, P2(1)/c, a = 9.006 (1), b = 14.209 (2), c = 10.908 (2) angstrom, beta = 117.88 (1)-degrees, V = 1233.9 (2) angstrom 3, Z = 4, D(x) = 2.559 Mg m-3, lambda(Mo K-alpha)BAR = 0.7107 angstrom, mu = 11.84 mm-1, F(000) = 896, T = 293 K, R = 0.033 for 1763 unique reflections [I > 3-sigma(I)]. The Pt atom coordinates two S atoms from two dimethyl sulfoxide ligands and two O atoms from different nitrate ions in a slightly distorted square-planar geometry (maximal deviation 0.10 angstrom) in a cis arrangement. The compound consists of van der Waals packed molecules appearing in pairs with a Pt-Pt distance of 4.008 (1) angstrom. The acceptor-donor distances observed are: Pt-S = 2.214 (3), 2.220 (3) and Pt-O = 2.040 (9), 2.059 (9) angstrom. These are almost the same as the corresponding ones previously found in tetrakis(dimethyl sulfoxide)platinum(II) bis(trifluoromethanesulfonate) where two dimethyl sulfoxide ligands bond to Pt via their O atoms, also in a cis position. A literature survey of platinum dimethyl sulfoxide compounds shows that the Pt-S distance is significantly affected by both cis and trans influences.

  • 3. George, Sumod
    et al.
    Nangia, Ashwini
    University of Hyderabad, School of Chemistry.
    Lynch, Vincent M.
    University of Texas, Department of Chemistry and Biochemistry.
    N-(4-Bi­phenyl­yl)­urea2001Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 57, nr 6, s. 777-778Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In the crystal structure of the title compound, C13H12N2O, N-H(anti)...O hydrogen bonds produce the so-called urea alpha-network and the N-H(syn) donor forms an unconventional N-H...pi hydrogen bond

  • 4.
    Hermansson, Kersti
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Kemiska institutionen.
    A neutron diffraction determination of the structure of deuterated aluminium nitrate nonahydrate, Al(NO 3) 3.9D 2O1983Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. C39, s. 925-930Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Mr=393.26, monoclinic, P2 1/ c, a=13.8937 (14), b=9.6258 (7), c=10.9127 (7) Aring, beta=95.66 (1)deg, V=1452.3 (2) Aring 3, T=295K [the cell parameters were determined from the refinement of 39 theta values from a Guinier-Hagg X-ray powder film (Cr Kalpha radiation, lambda=2.28975 Aring, using a CoP 3 standard: a=7.70778 Aring)], Z=4, Dx=1.80 Mg m -3, final Rw( F2)=0.069 for all 4480 independent reflections collected out to sintheta/lambda=0.69 Aring -1. The crystal structure of Al(NO 3) 3.9D 2O has been studied by three-dimensional neutron diffraction data collected at 295K. The asymmetric unit contains Al(D 2O) 63+ octahedra, NO 3- ions and three D 2O molecules which are not coordinated to Al 3+ ions. All nine water molecules in the formula unit are crystallographically independent and the 19 hydrogen bonds donated have O...O distances in the range 2.650 (2)-3.054 (2) Aring. The hydrogen bonds donated by the D 2O molecules which are coordinated to Al 3+ ions are shorter than the other hydrogen bonds. A distinct correlation exists between the O-D and D...O distances.

  • 5.
    Hermansson, Kersti
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Kemiska institutionen.
    Tellgren, Roland
    Lehmann, Mogens S.
    Neutron diffraction studies of potassium hydrogen diformate, KH(HCOO) 2, at 120 and 295K1983Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. C39, s. 1507-1510Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Mr=130.144, orthorhombic, Pbca, Z=8; at 120K a=17.705(8), b=7.349(4), c=7.302(3) Aring, V=950.1(8) Aring 3, Dx=1.820(1) g cm -3; at 295K, a=17.7079(9), b=7.5096(4), c=7.3774(4) Aring, V=981.05(9) Aring 3, Dx=1.7623(2) g cm -3. The crystal structure has been investigated by neutron diffraction at 120K (lambda=0.7228 Aring) and 295K (lambda=1.210 Aring); final R( F2) values are 0.041 (1418 reflections) and 0.065 (1365 reflections), respectively. The short intermolecular O...O hydrogen bond [2.437(1) Aring at 120K] is found to be asymmetrical [O-H 1.167(1), H...O 1.270(1) Aring] even though the bonding situations around the two formate groups are quite similar.

  • 6.
    Hermansson, Kersti
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Kemiska institutionen.
    Thomas, John O.
    The structure and electron deformation density of LiNO 2.H 2O at 295K1983Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. C39, s. 930-936Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Mr=70.959, monoclinic, P2 1/ c, Z=4, a=3.3387 (3), b=14.2980 (10), c=6.3961 (5) Aring, beta=105.10 (1)deg, V=294.79 (4) Aring 3, Dx=1.60 Mg m -3, Mo Kalpha, lambda=0.71069 Aring, mu calc=0.154 mm -1, T=295 K, F(000)=144. Two data sets were collected out to sintheta/lambda=0.91 Aring -1: one on a twinned crystal, the other on a single crystal. Positional and thermal parameters from the two data sets show only random deviations. Somewhat high Rw( F2) values of 0.084 and 0.081, respectively, resulted from the refinement of a spherical-atom model. This reflects the inadequacies of such a model. Introduction of multipolar deformation functions for the single-crystal data set brought the Rw( F2) value down to 0.029. The crystal contains one independent Li + ion with fivefold coordination, a tetrahedrally coordinated H 2O molecule and an NO 2- ion which accepts two medium-strength hydrogen bonds [O-H...O 2.755 (1); O-H...N 2.890 (1) Aring] and has three Li +-O contacts. The static deformation density for the NO 2- ion shows N-O bond maxima of 0.50 e Aring -3; O lone-pair maxima of 0.20-0.30 e Aring -3 are situated in the molecular planes at approximately 90deg to the N-O bonds. The lone-pair density associated with the water O is markedly asymmetric; no support for this effect has been found in theoretical model calculations, however.

  • 7.
    Hermansson, Kersti
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Kemiska institutionen.
    Thomas, John O.
    Olovsson, Ivar
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Kemiska institutionen.
    Deformation electron density of lithium nitrate trihydrate, LiNO 3.3H 2O, at 120 and 295K1984Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. C40, s. 341-342Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Mr=123.00, orthorhombic, Cmcm, Z=4; at 120K, a=6.713 (7), b=12.669 (4), c=5.968 (5) Aring, V=507.7 (7) Aring 3; at 295K, a=6.8018 (4), b=12.7132 (9), c=5.9990 (4), V=518.75 (6) Aring 3; m.p.=303.1K, Dx=1.575 g cm -3 (295K), f(000)=256; X-ray data (Mo Kalpha, lambda=0.71069 Aring) have been collected at 120K; final wR( F2) values 0.064 from conventional spherical-atom refinement and 0.033 from deformation refinement. The deformation electron density of LiNO 3.3H 2O has been studied at 120K (new data) and 295K in order to compare static and dynamic deformation maps derived at two temperatures. A combination of X-ray and neutron data has been used both for the X- N and the multipolar expansion maps. The N-O bond peaks are elongated perpendicular to the molecular plane. The water molecules show well developed deformation features and the hydrogen-bond density is consistent with what is usually observed for medium-strong hydrogen bonds.

  • 8.
    Jalilian, Ehsan
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
    Lidin, Sven
    Lunds universitet, Polymer- och materialkemi.
    Poly[dimethyldiphenylphosphonium [di-μ4-iodido-tetra-μ3-iodido-pentacopper(I)]]2010Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, nr C66, s. m227-m230Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The title compound, {(C14H16P)[Cu5I6]}n, prepared from the reaction between copper powder, iodine and dimethyldiphenylphosphonium iodide in hydroxyacetone, features an anion that consists of a continuous two-dimensional Cu-I sheet [Cu-I = 2.5960 (14)-2.6994 (13) Å and Cu-I-Cu = 63.28 (5)-114.25 (5)°]. The cation, which lies on a mirror plane, is a typical dimethyldiphenylphosphonium ion. The structure shows a strong tendency towards segregation of the inorganic and organic parts of the structure into separate subspaces. The two-dimensional Cu-I sheet displays a pronounced subcell with pseudo-tetragonal symmetry that is broken by ordered vacancies on the Cu position. The symmetry is further reduced by the orientation of the interleaved organic counter-ion that is inclined with respect to the pseudo-mirror planes defined by the Cu-I sheet normal, perpendicular to the b axis.

  • 9.
    Jonsson, K. Hanna M.
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för organisk kemi.
    Eriksson, Lars
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi.
    Widmalm, Göran
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för organisk kemi.
    Methyl 4-O-benzoyl-2,3-O-isopropylidene-a-L-rhamnopyranoside2006Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 62, nr 8, s. o447-o449Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The title compound, C17H22O6, having an ester group at O4 of the hexopyranosyl sugar residue shows for the exo-cyclic C=O bond a conformation that is eclipsed to the C4-H4 bond. The two related torsion angles are denoted by syn and cis conformations. The q1 torsion angle (H4-C4-O4-C10) is indicated to have a similar conformation in solution as analyzed by NMR spectroscopy and a Karplus-type relationship.

  • 10. KANSIKAS, JARNO
    et al.
    HERMANSSON, KERSTI
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Kemiska institutionen.
    THE STRUCTURE OF LITHIUM FORMATE1989Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 45, s. 187-191Artikel i tidskrift (Refereegranskat)
  • 11. Karmakar, Anirban
    et al.
    Platero-Prats, Ana E.
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
    Öhrström, Lars
    A new methanol solvate and Hirshfeld analysis of pi-stacking in 2,3,6,7,10,11-hexahydroxytriphenylene solvates2013Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 69, s. 251-254Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The structure of 2,3,6,7,10,11-hexahydroxytriphenylene (hhtp) methanol monosolvate, C18H12O6 center dot CH3OH, has triclinic symmetry (space group P (1) over bar). The compound has a three-dimensional layered network structure formed by inter-molecular hydrogen bonding. Structure analysis with Hirshfeld surfaces is shown to be a sensitive method for comparing pi-stacking effects in the five known solvates of hhtp. The title structure shows slightly weaker pi-stacking than the dihydrate, but stronger pi-stacking than the other three solvates.

  • 12.
    Käll, Per-Olov
    et al.
    University of Stockholm.
    Grins, Jekabs
    University of Stockholm.
    Nygren, Mats
    University of Stockholm.
    Structure of the Nd U-Phase, Nd3Al3.5Si2.5O12.5N1.5; a Nitrogen-Containing Phase of the La3Ga5GeO14 Structure Type1991Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 47, nr 10, s. 2015-2019Artikel i tidskrift (Refereegranskat)
    Abstract [en]

     n/a

     

     

     

     

     

     

  • 13.
    Lou, B
    et al.
    Luleå tekniska universitet.
    Boström, Dan
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik, Energiteknik och termisk processkemi.
    Velaga, Sitaram P
    Luleå tekniska universitet.
    Hydrogen-bonding interactions in the 4-aminobenzoic acid salt of atenolol monohydrate2007Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 63, nr 12, s. 714-716Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Atenolol {or 4-[2-hydroxy-3-(isopropylamino)propoxy]phenylacetamide} crystallizes with 4-aminobenzoic acid to give the salt {3-[4-(aminocarbonylmethyl)phenoxy]-2-hydroxypropyl}isopropylammonium 4-aminobenzoate monohydrate, C14H23N2O3+·C7H6NO2-·H2O. In the crystal structure, the water molecule, the carboxylate group of 4-aminobenzoate, and the hydroxy and ether O atoms of atenolol form a supramolecular R33(11) heterosynthon. Three other types of supramolecular synthons link the asymmetric unit into a two-dimensional structure.

  • 14. Lou, Benyong
    et al.
    Bostrom, Dan
    Velaga, Sitaram P.
    Monohydrous dihydrogen phosphate salts of norfloxacin and ciprofloxacin2007Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 63, s. O731-O733Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Norfloxacin and ciprofloxacin crystallize with phosphoric acid in aqueous solution to give the salts 4-(3-carboxy-1-ethyl-6-uoro- 4-oxo-1,4-dihydro-7-quinolyl) piperazinium dihydrogenphosphate monohydrate, C16H19FN3O3+center dot H2PO4-center dot H2O, and 4-(3-carboxy-1-cyclopropyl-6-uoro-4-oxo-1,4-dihydro-7quinolyl) piperazinium dihydrogenphosphate monohydrate, C17H19FN3O3+center dot H2PO4-center dot H2O, respectively. In the crystal structures, the phosphate anions and the piperazine rings of norfloxacin or ciprofloxacin form a 12-membered supramolecular synthon, viz. R-4(4)(12). The synthons R-4(4)(12) and R-2(2)(8) formed between adjacent phosphate anions result in the three-dimensional structures.

  • 15.
    Lou, Benyong
    et al.
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Medicinsk vetenskap.
    Boström, Dan
    Energy Technology and Thermal Process Chemistry, Umeå University.
    Velaga, Sitaram
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Medicinsk vetenskap.
    Hydrogen-bonding interactions in the 4-aminobenzoic acid salt of atenolol monohydrate2007Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 63, nr 12, s. 714-716Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Atenolol {or 4-[2-hydroxy-3-(isopropylamino)propoxy]phenyl-acetamide} crystallizes with 4-aminobenzoic acid to give the salt {3-[4-(aminocarbonylmethyl)phenoxy]-2-hydroxypropy1}- isopropylammonium 4-aminobenzoate monohydrate, C14H23- N2O3*C7H6NO2-*H2O. In the crystal structure, the water molecule, the carboxylate group of 4-aminobenzoate, and the hydroxy and ether O atoms of atenolol form a supramolecular R33(11) heterosynthon. Three other types of supramolecular synthons link the asymmetric unit into a two-dimensional structure.

  • 16.
    Lou, Benyong
    et al.
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Medicinsk vetenskap.
    Boström, Dan
    Energy Technology and Thermal Process Chemistry, Umeå University.
    Velaga, Sitaram
    Luleå tekniska universitet, Institutionen för hälsovetenskap, Medicinsk vetenskap.
    Monohydrous dihydrogen phosphate salts of norfloxacin and ciprofloxacin2007Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 63, nr 12, s. 731-733Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Norfloxacin and ciprofloxacin crystallize with phosphoric acid in aqueous solution to give the salts 4-(3-carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydro-7-quinolyl)piperazinium dihydrogenphosphate monohydrate, C16H19FN3O3(+) x H2PO4(-) x H2O, and 4-(3-carboxy-1-cyclopropyl-6-fluoro-4-oxo-1,4-dihydro-7-quinolyl)piperazinium dihydrogenphosphate monohydrate, C17H19FN3O3(+) x H2PO4(-) x H2O, respectively. In the crystal structures, the phosphate anions and the piperazine rings of norfloxacin or ciprofloxacin form a 12-membered supramolecular synthon, viz. R4(4)(12). The synthons R4(4)(12) and R2(2)(8) formed between adjacent phosphate anions result in the three-dimensional structures.

  • 17. Ma, G. B.
    et al.
    Fischer, Andreas
    KTH, Tidigare Institutioner                               , Kemi.
    Glaser, Julius
    KTH, Tidigare Institutioner                               , Kemi.
    The trigonal-bipyramidal triiodothallium(III) complex TlI3{(CH3)(2)SO}(2)2002Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 58, s. m177-m178Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The title compound, bis(dimethyl sulfoxide)triiodothallium(III), [TlI3 (C2H6OS)(2)], was crystallized from equimolar amounts of (TlI)-I-I and I-2 in a dimethyl sulfoxide (DMSO) solution. After the initial redox reaction, the thallium(III)- iodo complex forms and precipitates as a DMSO solvate. In the crystal structure, Tl is surrounded by three iodide ligands in the equatorial plane and two O-coordinated DMSO molecules in the axial positions, forming a slightly distorted trigonal bipyramid. The complex lies on a twofold rotation axis, making the DMSO molecules and two of the I atoms crystallographically equivalent.

  • 18. Ma, G. B.
    et al.
    Ilyukhin, A.
    Glaser, Julius
    KTH, Tidigare Institutioner                               , Kemi.
    2,2 '-Bipyridinium bis(perchlorate)2000Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 56, s. 1473-1475Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The title compound, [H(2)bipy](ClO4)(2) or C10H10N22+. 2ClO(4)(-), was obtained at the interface between an organic (2,2'-bipyridine in methanol) and an aqueous phase (perchloric acid in water). The compound crystallizes in space group P(1) over bar and comprises discrete diprotonated trans-bipyridinium cations, [H(2)bipy](2+), and ClO4- anions. The cations and anions are connected through N-H . . .O and C-H . . .O hydrogen bonds [distances N . . .O 2.817 (4) and 2.852 (4) Angstrom, and C . . .O 3.225 (6)-3.412 (5)Angstrom]. The C-C bond distance between the two rings is 1.452 (5) Angstrom. The bipyridinium cation has a trans conformation and the N-C-C-N torsion angle is 152.0 (3)degrees.

  • 19.
    Raj, S. Shanmuga Sundara
    et al.
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Fun, Hoong-Kun
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Xie, fuxin
    Department of Chemistry, Anhui University, China.
    Ma, Jilong
    Department of Chemistry, Anhui University, China.
    4-(N-Hydroxyethyl -N-methylamino)-benzaldehyde thiosemicarbazone2000Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. c56, s. 1238-1239Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In the crystal structure of the title compound, C11H16N4OS, the phenyl ring and the thiosemicarbazone moiety from a dihedral angle of 7.7 (1)°. The crystal structure is governed by N-H...O and O-H...S hydrogen bonds leading to the formation of a two-dimensional network.

  • 20.
    Sahlberg, Martin
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för materialkemi, Oorganisk kemi.
    Andersson, Yvonne
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för materialkemi, Oorganisk kemi.
    Sc2MgGa2 and Y2MgGa22009Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. C65, nr 3, s. i7-i8Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Scandium magnesium gallide, Sc2MgGa2, and yttrium magnesium gallide, Y2MgGa2, were synthesized from the corresponding elements by heating under an argon atmosphere in an induction furnace. These intermetallic compounds crystallize in the tetragonal Mo2FeB2-type structure. All three crystallographically unique atoms occupy special positions and the site symmetries of (Sc/Y, Ga) and Mg are m2m and 4/m, respectively. The coordinations around Sc/Y, Mg and Ga are pentagonal (Sc/Y), tetragonal (Mg) and triangular (Ga) prisms, with four (Mg) or three (Ga) additional capping atoms leading to the coordination numbers [10], [8+4] and [6+3], respectively. The crystal structure of Sc2MgGa2 was determined from single-crystal diffraction intensities and the isostructural Y2MgGa2 was identified from powder diffraction data.

  • 21.
    Svensson, Gunnar
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
    Eriksson, Lars
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för material- och miljökemi (MMK).
    BaNb4-xTixO6 (x = 0.53)1999Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. C55, s. 17-19Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The title compound, barium niobium titanium oxide, is isostructural with BaNb4O6, i.e. it contains alternating NbO and perovskite-type single slabs. The NbO slabs can alternatively be described as layers of Nb6O12 clusters, condensed via corner sharing among the central Nb6 octahedra.

  • 22.
    Zhang, Dong
    et al.
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi.
    Johnsson, Mats
    Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi.
    Nickel vanadium tellurium oxide, NiV2Te2O102009Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 65, s. i9-i10Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Single crystals of a nickel vanadium tellurium oide were synthesized. The crystal structure is layered. The buliding units are VO~6~ octahedra and NiO~6~ octahedra and TeO~4~E distorted square pyramids (E being the 5s2^ lone-electron pair of Te^IV^).

  • 23. Zhang, X. F.
    et al.
    Huang, D. G.
    Feng, C.
    Chen, C. N.
    Liu, Q. T.
    Sun, Licheng C.
    catena-Poly (1,10-phenanthroline-kappa N-2,N ')manganese(II) -mu-L-tartrato-kappa O-4(1),O-2: O-3,O-4 hexahydrate2003Ingår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. 59, s. M402-M404Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The title compound, {[Mn(C4H4O6)(C12H8N2)] . 6H(2)O}(n), has a linear chain structure containing monomeric [ Mn( C4H4O6)( C12H8N2)] repeat units. Each manganese ion is six-coordinate, with the two phenanthroline N atoms [Mn - N = 2.229 (2) and 2.235 (2) Angstrom] and four O atoms from two tartrate anions [Mn - O-COO = 2.1252 (19) and 2.1310 (19) Angstrom, and Mn - O-OH = 2.2404 (19) and 2.2424 (19) Angstrom] forming a seriously distorted octahedral coordination environment. Six water molecules exist outside every repeat unit as solvate molecules. Extensive hydrogen-bonding interactions and pi-pi stacking of the phenanthroline moieties exist between the chains.

1 - 23 av 23
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