Now showing items 1-20 of 10450

  • 1,1'-Diethyl-4,4'-bipyridine-1,1'-diium bis(1,1,3,3-tetracyano-2- ethoxypropenide) : multiple C-H⋯N hydrogen bonds form a complex sheet structure 

    Setifi, Z.; Lehchili, F.; Setifi, F.; Beghidja, A.; Ng, S.W.; Glidewell, C. (2014-03-01) - Journal article
    In the title salt, C14H18N22+·2C9H5N4O−, the 1,1′-diethyl-4,4′-bipyridine-1,1′-diium dication lies across a centre of inversion in the space group P21/c. In the 1,1,3,3-tetracyano-2-ethoxypropenide anion, the two independent ...
  • 1,2,5-Selenadiazolo[3,4-b]pyrazines : synthesis from 3,4-Diamino-1,2,5-selenadiazole and Generation of Persistent Radical Anions 

    Konstantinova, Lidia S.; Bobkova, Irina E.; Nelyubina, Yulia V.; Chulanova, Elena A.; Irtegova, Irina G.; Vasilieva, Nadezhda V.; Sanz Camacho, Paula; Ashbrook, Sharon Elizabeth Marie; Hua, Guoxiong; Slawin, Alexandra Martha Zoya; Woollins, J Derek; Zibarev, Andrey V.; Rakitin, Oleg A. (2015-09) - Journal article
    Synthesis of 3,4-disubstituted and fused 1,2,5-selenadiazolo[3,4-b]pyrazines via previously unknown 3,4-diamino-1,2,5-selenadiazole has been achieved in moderate to high yields. The compounds synthesized were characterized ...
  • 1,2-Bis(2-bromobenzyl)diselane 

    Hua, Guoxiong; Fuller, Amy L.; Slawin, Alexandra M. Z.; Woollins, J. Derek (2010-10) - Journal article
    In the title compound, C14H12Br2Se2, the Se-Se bond length [2.3034 (9) angstrom] is similar to those in diphenyl diselenide [2.3066 (7) and 2.3073 (10) angstrom] and shorter than that in 1,8-diselenonaphthalene [2.0879 (8) ...
  • 1,2-bis-(ditertbutylphosphinomethyl)benzene in catalysis 

    Jiménez, Cristina (University of St Andrews, 2004) - Thesis
    Different diphosphine ligands having the structure shown below have been studied for carbonylation and hydroformylation reactions. Depending on the substituent on the phosphorus atoms the electronic and steric properties ...
  • 1,4-Oxazine 

    Aitken, R Alan; Aitken, Kati Marianne; Carruthers, Phillip G; Jean, Marc-Alexandre; Slawin, Alexandra Martha Zoya (2013) - Journal article
    The fundamental heterocyclic compound 1,4-oxazine has been generated using FVP. It is the first parent heterocycle among all the possible isomeric oxazines, thiazines and their heavier atom analogues to be characterised ...
  • 1,5,6-Triphenyl-8-oxa-7-selena-6-phosphabicyclo[3.2.1]octane-6-selone 

    Hua, Guoxiong; Li, Yang; Slawin, Alexandra Martha Zoya; Woollins, J Derek (2008-01) - Journal article
    The structure of the title compound, C23H21OPSe2, consists of fused puckered five- and six-membered rings, PSeC2O and C5O, respectively, with a C2O bridgehead. The C5O ring adopts a chair conformation, whilst the C2PSeO ...
  • 1-(3-Phenylpropyl)urea 

    Li, Yang; Hua, Guoxiong; Slawin, Alexandra M. Z.; Woollins, J. Derek (2009-10) - Journal article
    In the crystal of the title compound, C10H14N2O, double supramolecular layers of PhCH2CH2CH2NHC(O)NH2 are formed parallel to the bc plane by intermolecular N-H center dot center dot center dot O hydrogen bonding, with ...
  • A 1.9 Earth radius rocky planet and the discovery of a non-transiting planet in the Kepler-20 system 

    Buchhave, Lars A.; Dressing, Courtney D.; Dumusque, Xavier; Rice, Ken; Vanderburg, Andrew; Mortier, Annelies; Lopez-Morales, Mercedes; Lopez, Eric; Lundkvist, Mia S.; Kjeldsen, Hans; Affer, Laura; Bonomo, Aldo S.; Charbonneau, David; Cameron, Andrew Collier; Cosentino, Rosario; Figueira, Pedro; Fiorenzano, Aldo F. M.; Harutyunyan, Avet; Haywood, Raphaëlle D.; Johnson, John Asher; Latham, David W.; Lovis, Christophe; Malavolta, Luca; Mayor, Michel; Micela, Giusi; Molinari, Emilio; Motalebi, Fatemeh; Nascimbeni, Valerio; Pepe, Francesco; Phillips, David F.; Piotto, Giampaolo; Pollacco, Don; Queloz, Didier; Sasselov, Dimitar; Ségransan, Damien; Sozzetti, Alessandro; Udry, Stéphane; Watson, Chris (2016-11-11) - Journal article
    Kepler-20 is a solar-type star (V = 12.5) hosting a compact system of five transiting planets, all packed within the orbital distance of Mercury in our own Solar System. A transition from rocky to gaseous planets with a ...
  • 1/3 magnetization plateau and frustrated ferrimagnetism in a sodium iron phosphite 

    Vasiliev, A; Volkova, O; Zvereva, E; Ovchenkov, E; Munao', Irene; Clark, Lucy Mary; Lightfoot, Philip; Vavilova, E; Kamusella, S; Klaus, H; Werner, J; Koo, C; Klingeler, R; Tsirlin, A (2016-04-01) - Journal article
    The sodium-iron phosphite NaFe3(HPO3)2(H2PO3)6 is studied by ac-magnetic susceptibility, pulsed-field magnetization, specific heat, and high-frequency electron spin resonance (HF-ESR) measurements combined with Mössbauer ...
  • $100 a barrel of oil : impacts on the sustainability of food supply in the UK 

    ADAS (Sustainable Development Commission, 2007-11) - Report
    This study asks a simple question: what would be the impact on food of oil prices rising to $100 a barrel? When the Sustainable Development Commission commissioned this research, oil was nearly half the price it is at the ...
  • $100 a barrel of oil : impacts on the sustainability of food supply in the UK [executive summary] 

    Sustainable Development Commission (Sustainable Development Commission, 2007-11) - Report
    This study asks a simple question: what would be the impact on food of oil prices rising to $100 a barrel? When the Sustainable Development Commission commissioned this research, oil was nearly half the price it is at the ...
  • 2 μm solid-state laser mode-locked by single-layer graphene 

    Lagatsky, A. A.; Sun, Z.; Kulmala, T. S.; Sundaram, R. S.; Milana, S.; Torrisi, F.; Antipov, O. L.; Lee, Y.; Ahn, J. H.; Brown, C. T. A.; Sibbett, W.; Ferrari, A. C. (2013-01-07) - Journal article
    We report a 2 μm ultrafast solid-state Tm : Lu2O3 laser, mode-locked by single-layer graphene, generating transform-limited similar to 410 fs pulses, with a spectral width similar to 11.1 nm at 2067 nm. The maximum average ...
  • 2,2 '-o-Phenylenediacetonitrile 

    Li, Yang; Hua, Guoxiong; Slawin, Alexandra M. Z.; Woollins, J. Derek (2009-11) - Journal article
    In the title compound, NCCH2C6H4CH2CN, the bond lengths and angles are within normal ranges. The benzene ring makes dihedral angles of 4.94 (8) and 77.04 (8)degrees with the C-C-C-N mean planes. Weak non-conventional C-H ...
  • 2,4,5-Triphenyl-1,3,2-dioxaphospholan-2-one 

    Cordes, David B.; Hua, Guoxiong; Slawin, Alexandra M. Z.; Woollins, J. Derek (2011-07) - Journal article
    The dioxaphospholane ring in the title compound, C20H17O3P, adopts an envelope conformation about one of the ring carbons. The benzene rings of the compound do not form face-to-face pi-pi interactions, instead weak C-H ...
  • 2-(4-Fluorophenyl)-3-methyl-1H-indole 

    Cordes, David B.; Hua, Guoxiong; Slawin, Alexandra M. Z.; Woollins, J. Derek (2011-07) - Journal article
    The indole N-H hydrogen in the title compound, C15H12FN, does not display classical hydrogen bonding. Rather it forms an interaction with the pi system of an adjacent indole, resulting in weakly interacting chains along ...
  • 2-Arylacetic anhydrides as ammonium enolate precursors 

    Morrill, Louis C.; Ledingham, Lyndsay A.; Couturier, Jean-Philippe; Bickel, Jasmine; Harper, Andrew D.; Fallan, Charlene; Smith, Andrew D. (2014-01-28) - Journal article
    Readily prepared 2-arylacetic anhydrides act as convenient ammonium enolate precursors in isothiourea (HBTM-2.1)-mediated catalytic asymmetric intermolecular Michael addition-lactonisation processes, giving diverse synthetic ...
  • 2-Phenyl-5-(p-tolyl)-1,3,4-oxadiazole 

    Cordes, David B.; Hua, Guoxiong; Slawin, Alexandra M. Z.; Woollins, J. Derek (2011-07) - Journal article
    The title compound, C15H12N2O, adopts the expected near-planar geometry, the phenyl and tolyl rings being inclined relative to the oxadiazole ring by 3.8 (3) and 8.3 (2)degrees, respectively. This allows adjacent molecules ...
  • The 2014-2017 outburst of the young star ASASSN-13db. A time-resolved picture of a very low-mass star between EXors and FUors 

    Sicilia-Aguilar, A.; Oprandi, A.; Froebrich, D.; Fang, M.; Prieto, J. L.; Stanek, K.; Scholz, A.; Kochanek, C. S.; Henning, Th.; Gredel, R.; Holoien, T. W.-S.; Rabus, M.; Shappee, B. J.; Billington, S. J.; Campbell-White, J.; Zegmott, T. J. (2017-08-04) - Journal article
    Context. ASASSN-13db is a M5-type star with a protoplanetary disk, the lowest mass star known to experience accretion outbursts. Since its discovery in 2013, it has experienced two outbursts, the second of which started ...
  • A 220 GHz 3D imaging radar with sub-cm3 voxel resolution for security applications 

    Robertson, Duncan Alexander; MacFarlane, David Graham; Bryllert, Tomas (IEEE, 2017-01-19) - Conference item
    Radars operating at high millimetre and sub-millimetre wave frequencies are promising candidates for security applications such as people screening since they offer the possibility to form 3D images through clothing with ...
  • 220GHz wideband 3D imaging radar for concealed object detection technology development and phenomenology studies 

    Robertson, Duncan Alexander; Macfarlane, David Graham; Bryllert, Tomas (SPIE, 2016-05-12) - Conference item
    We present a 220 GHz 3D imaging ‘Pathfinder’ radar developed within the EU FP7 project CONSORTIS (Concealed Object Stand-Off Real-Time Imaging for Security) which has been built to address two objectives: (i) to de-risk ...