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    11 results match your criteria Acta crystallographica. Section C Crystal structure communications[Journal]

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    Absolute-structure reports.
    Acta Crystallogr C 2013 Aug 9;69(Pt 8):803-7. Epub 2013 Jul 9.
    Chimie minérale, analytique et appliquée, University of Geneva, Geneva, Switzerland.
    All the 139 noncentrosymmetric crystal structures published in Acta Crystallographica Section C between January 2011 and November 2012 inclusive have been used as the basis of a detailed study of the reporting of absolute structure. These structure determinations cover a wide range of space groups, chemical composition and resonant-scattering contribution. Defining A and D as the average and difference of the intensities of Friedel opposites, their level of fit has been examined using 2AD and selected-D plots. Read More

    A chiral interdigitated supramolecular network assembled from single-stranded helical tubes.
    Acta Crystallogr C 2011 Jul 17;67(Pt 7):m227-9. Epub 2011 Jun 17.
    Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, People's Republic of China.
    The amino-functionalized helical chiral one-dimensional coordination polymer catena-poly[[bis(pyridine-κN)zinc(II)]-μ-2-aminobenzene-1,4-dicarboxylato-κ(4)O(1),O(1'):O(4),O(4')], [Zn(C(8)H(5)NO(4))(C(5)H(5)N)(2)](n), has an extended structure that is assembled from 2-aminobenzene-1,4-dicarboxylate anions and Zn(2+) cations and which presents a left-handed 4(3) helix with a pitch of 25.6975 (9) Å. All the pyridine rings and all the amino groups point away from the helix to generate a hollow tube with a cross-section of approximately 8 × 8 Å running parallel to the crystallographic c direction. Read More

    A novel threefold-interpenetrating primitive cubic network based on a dinuclear Zn2 node.
    Acta Crystallogr C 2009 Feb 14;65(Pt 2):m82-5. Epub 2009 Jan 14.
    College of Pharmacy, Dalian Medical University, Dalian 116044, People's Republic of China.
    In the mixed-ligand metal-organic polymeric compound poly[[mu(2)-1,4-bis(imidazol-1-yl)benzene](mu(2)-terephthalato)dizinc(II)], [Zn(2)(C(8)H(4)O(4))(2)(C(12)H(10)N(4))](n) or [Zn(2)(bdc)(2)(bib)](n) [H(2)bdc is terephthalic acid and bib is 1,4-bis(imidazol-1-yl)benzene], the asymmetric unit contains one Zn(II) ion, with two half bdc anions and one half bib molecule lying around inversion centers. The Zn(II) ion is in a slightly distorted tetrahedral environment, coordinated by three carboxylate O atoms from three different bdc anions and by one bib N atom. The crystal structure is constructed from the secondary building unit (SBU) [Zn(2)(CO(2))(2)N(2)O(2)], in which the two metal centers are held together by two bdc linkers with bis(syn,syn-bridging bidentate) bonding modes. Read More

    The 1:1 inclusion compounds zolmitriptan-benzene and zolmitriptan-phenol.
    Acta Crystallogr C 2007 Jul 23;63(Pt 7):o437-40. Epub 2007 Jun 23.
    Laboratory of X-ray Crystallography, Indian Institute of Chemical Technology, Hyderabad 500 007, India.
    In the benzene and phenol solvates of (S)-4-{3-[2-(dimethylamino)ethyl]-1H-indol-5-ylmethyl}oxazolidin-2-one, viz. C(16)H(21)N(3)O(2) x C(6)H(6), (I), and C(16)H(21)N(3)O(2) x C(6)H(5)OH, (II), the host molecule has three linked residues, namely a planar indole ring system, an ethylamine side chain and an oxazolidinone system. It has comparable features to that of sumatriptan, although the side-chain orientations of (I) and (II) differ from those of sumatriptan. Read More

    Rubidium dimolybdate, Rb(2)Mo(2)O(7), and caesium dimolybdate, Cs(2)Mo(2)O(7).
    Acta Crystallogr C 2006 Jul 15;62(Pt 7):i53-6. Epub 2006 Jun 15.
    Nikolaev Institute of Inorganic Chemistry, SB Russian Academy of Sciences, Academician Lavrentiev Avenue 3, Novosibirsk 630090, Russian Federation.
    The crystal structures of dirubidium heptaoxodimolybdate, Rb(2)Mo(2)O(7), and dicaesium heptaoxodimolybdate, Cs(2)Mo(2)O(7), in the space groups Ama2 and P2(1)/c, respectively, have been determined for the first time by single-crystal X-ray diffraction. The structures represent two novel structure types of monovalent ion dimolybdates, A(2)Mo(2)O(7) (A = alkaline elements, NH(4), Ag or Tl). In the structure of Rb(2)Mo(2)O(7), Mo atoms are on a twofold axis, on a mirror plane and in a general position. Read More

    Dilead(II) trimercury(II) tetraoxide chromate(VI), Pb2(Hg3O4)(CrO4).
    Acta Crystallogr C 2005 Jun 13;61(Pt 6):i63-4. Epub 2005 May 13.
    Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany.
    Pb2(Hg3O4)(CrO4) consists of [CrO4]2- tetrahedra, linear O-Hg-O dumbbells and divalent Pb atoms in [3+5]-coordination. The HgO2 dumbbells are condensed into [Hg3O4]2- units and can be regarded as a section of the HgO structure. The [Hg3O4]2- complex anions are connected by interstitial Pb2+ ions, while the [CrO4]2- tetrahedra are isolated. Read More

    3-Oxa-6,8-diaza-1,2:4,5-dibenzocycloocta-1,4-dien-7-one: a three-dimensional network assembled by hydrogen-bonding, pi-pi and edge-to-face interactions.
    Acta Crystallogr C 2004 Feb 17;60(Pt 2):o136-9. Epub 2004 Jan 17.
    Fachbereich Chemie und Pharmazie, Abteilung Lehramt Chemie, Johannes-Gutenberg-Universität, Duesbergweg 10-14, 55099 Mainz, Germany.
    The title compound, C(13)H(10)N(2)O(2), is the first structure in which the urea moiety is incorporated into an eight-membered ring. Two molecules are found in the asymmetric unit, which are almost identical in their conformation and their hydrogen-bond pattern. The carbonyl O atom acts as a double acceptor for the NH groups of two adjacent molecules. Read More

    Acta Crystallogr C 2003 Oct 16;59(Pt 10):O539-40. Epub 2003 Sep 16.
    Department of Geology, Southern Illinois University-4324, Carbondale, IL 62901, USA.
    The title compound, C(23)H(22), (I), crystallizes in an ap conformationThe designations sp (synperiplanar) and ap (antiperiplanar) for these fluorene rotamers are in accordance with Rule E-6.6, IUPAC Tentative Rules, Section E, Fundamental Stereochemistry [J. Org. Read More

    Cyclic lipoundecapeptide amphisin from Pseudomonas sp. strain DSS73.
    Acta Crystallogr C 2001 Sep 11;57(Pt 9):1123-4. Epub 2001 Sep 11.
    Marine Chemistry Section, Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark.
    The crystal structure of the lipoundecapeptide amphisin, presented here as the tetrahydrate, C(66)H(114)N(12)O(20).4H(2)O, originating from non-ribosomal biosynthesis by Pseudomonas sp. strain DSS73, has been solved to a resolution of 0. Read More

    Acta Crystallogr C 2001 Apr;57(Pt 4):497-8
    Bijvoet Centre for Biomolecular Research, Department of Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.
    In the crystal structure of C(15)H(20)O(2), molecules are associated by intermolecular hydrogen bonds between the hydroxy function and a keto group [O.O 2.770 (2) A], forming chains along the [100] direction in the crystal. Read More

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