William T. A. Harrison

University of Aberdeen, Aberdeen, Scotland, United Kingdom

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Publications (690)578.82 Total impact

  • William T. A. Harrison, Magnus G. Johnston
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    ABSTRACT: (NH4)(VIVO2)(VVO2) (TeO3) is obtained by solvothermal processing of a mixture of V2O5, TeO2, NH3, and H2O (pH 8.5, autoclave, 438 K, 3 d).
    ChemInform 09/2014; 45(38).
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    William T A Harrison, John Nicolson Low, James L Wardell
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    ABSTRACT: In the title benzohydrazide hydrate, C14H12N2O3·H2O, the dihedral angle between the aromatic rings is 58.11 (6)° and the C=O and N-H groups adopt an anti orientation. The main twist in the mol-ecule occurs about the C(=O)-Car (ar = aromatic) bond, with an N-C(=O)-Car-Car torsion angle of -43.5 (2)°. In the crystal, the components are linked by N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds. These inter-actions generate [10-1] chains, with adjacent organic mol-ecules linked by inversion symmetry generating either pairs of N-H⋯O links [R 2 (2)(16) loops] or pairs of O-H⋯O links [R 2 (2)(20) loops]. Pairs of water mol-ecules are located in the R 2 (2)(20) loops and form their own O-H⋯O and O-H⋯N hydrogen bonds to adjacent organic mol-ecules in the chain. Finally, an inter-chain O-H⋯O hydrogen-bond link from the 4-hy-droxy group generates (010) sheets.
    Acta Crystallographica Section E Structure Reports Online 09/2014; 70(Pt 9):o891-2. · 0.35 Impact Factor
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    ABSTRACT: In the title compound, C9H13N3O, the cyclo-hexyl-idene ring adopts a chair conformation and the bond-angle sum at the C atom linked to the N atom is 359.6°. The cyano-acetohydrazide grouping is close to planar (r.m.s. deviation for the non-H atoms = 0.031 Å) and subtends a dihedral angle of 64.08 (4)° with the four C atoms forming the seat of the chair. The C=O and N-H groups are in a syn conformation (O-C-N-H = -5°). In the crystal, inversion dimers linked by pairs of N-H⋯O hydrogen bonds generate R 2 (2)(8) loops; this dimer linkage is reinforced by a pair of C-H⋯O inter-actions, which generate R 2 (2)(14) loops. The dimers are linked by C-H⋯Nc (c = cyanide) inter-actions into [100] ladders, which feature C(4) chains and R 4 (4)(20) loops.
    Acta Crystallographica Section E Structure Reports Online 09/2014; 70(Pt 9):o886. · 0.35 Impact Factor
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    William T A Harrison
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    ABSTRACT: The complete polyoxidometallate anion in the title compound, (CH6N3)4[H6V4As6O30]·4H2O, is generated by crystallographic inversion symmetry. The polyhedral building units are distorted VO6 octa-hedra and AsO3OH tetra-hedra. The VO6 units feature a short formal V=O double bond and are linked by a common edge. Two such V2O6 double octahedral units are linked by four isolated AsO3OH tetra-hedra to complete the anion, which features two inter-nal O-H⋯O hydrogen bonds. In the crystal, O-H⋯O hydrogen bonds between the polyoxidometallate anions generate (01-1) sheets. The sheets are connected by cation-to-cluster N-H⋯O hydrogen bonds, and cation-to-water N-H⋯O links also occur. The O atom of one of the water mol-ecules is disordered over two sites in a 0.703 (17):0.297 (17) ratio.
    Acta Crystallographica Section E Structure Reports Online 09/2014; 70(Pt 9):m305-6. · 0.35 Impact Factor
  • William T A Harrison, James L Wardell
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    ABSTRACT: The title compounds, K(+)·C7H7BF3O(-), (I), and K(+)·C6H4BF4 (-), (II), are mol-ecular salts containing para-substituted phenyl-tri-fluorido-borate anions. In each compound, the B atom adopts a distorted tetra-hedral BCF3 geometry. Despite their different compositions and space groups, the irregular KF8 coordination polyhedra of the potassium cations in the structures are almost identical. These polyhedra share faces and edges, generating infinite (010) layers in (I) and infinite (001) layers in (II). In (I), adjacent layers are stacked in an AAA… fashion, whereas in (II), they are stacked in an ABAB… sequence.
    Acta Crystallographica Section E Structure Reports Online 08/2014; 70(Pt 8):68-71. · 0.35 Impact Factor
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    William T A Harrison, Lutfun Nahar, Alan B Turner
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    ABSTRACT: In the title compound, C40H50O6, a symmetrical steroid oxalate diester, the dihedral angle between the CO2 planes of the oxalate linker is 61.5 (5)° and the C-C bond length is 1.513 (6) Å. The steroid B, C and D rings adopt half-chair, chair and envelope conformations, respectively, in both halves of the mol-ecule, which adopts an overall shallow V-shaped conformation. In the crystal, mol-ecules are linked by weak C-H⋯O inter-actions, forming a three-dimensional network.
    Acta Crystallographica Section E Structure Reports Online 08/2014; 70(Pt 8):62-4. · 0.35 Impact Factor
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    ABSTRACT: The title compound, poly[[di-aqua-bis-[1,5-bis-(pyridin-4-yl)pentane-κ(2) N:N']cadmium] bis-(perchlorate) 1,5-bis-(pyridin-4-yl)pentane ethanol mono-solvate], [Cd(C15H18N2)2(H2O)2](ClO4)2·C15H18N2·C2H6O, is a layered coordination polymer built up from highly squashed 4(4) nets in which the octa-hedral trans-CdO2N4 nodes (Cd site symmetry -1) are linked by the bifunctional ligands, forming infinite (110) sheets. The cationic sheets are charge-balanced by inter-layer perchlorate ions. A free 1,5-bis-(pyridin-4-yl)pentane mol-ecule and an ethanol mol-ecule of crystallization are also found in the inter-sheet region. A number of O-H⋯O, O-H⋯N and C-H⋯O hydrogen bonds help to consolidate the layered structure.
    Acta Crystallographica Section E Structure Reports Online 08/2014; 70(Pt 8):80-3. · 0.35 Impact Factor
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    W.T.A. Harrison, J.L. Wardell
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    ABSTRACT: The title compounds, K+·C7H7BF3O−, (I), and K+·C6H4BF4−, (II), are mol­ecular salts containing para-substituted phenyl­tri­fluorido­borate anions. In each compound, the B atom adopts a distorted tetra­hedral BCF3 geometry. Despite their different compositions and space groups, the irregular KF8 coordination polyhedra of the potassium cations in the structures are almost identical. These polyhedra share faces and edges, generating infinite (010) layers in (I) and infinite (001) layers in (II). In (I), adjacent layers are stacked in an AAA… fashion, whereas in (II), they are stacked in an ABAB… sequence.
    Acta Crystallographica Section E Structure Reports Online 07/2014; 70(8). · 0.35 Impact Factor
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    William T A Harrison, Magnus G Johnston
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    ABSTRACT: The polyhedral building blocks of the layered inorganic network in the mixed-valence title compound, (NH4)(V(IV)O2)(V(V)O2)(TeO3), are vertex-sharing V(V)O4 tetra-hedra, distorted V(IV)O6 octa-hedra and TeO3 pyramids, which are linked by V-O-V and V-O-Te bonds, forming double layers lying parallel to (100). The presumed Te(IV) lone-pairs of electrons appear to be directed inwards into cavities in the double layers. The charge-balancing ammonium cations lie between the layers and probably inter-act with them via N-H⋯O hydrogen bonds.
    Acta Crystallographica Section E Structure Reports Online 07/2014; 70(Pt 7):27-30. · 0.35 Impact Factor
  • M. John Plater, William T.A. Harrison
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    ABSTRACT: The oxidation of p-toluidine in H+/H2O can give mainly a tetramer, a trimer, or a mixture of both. The outcome is dependent upon the oxidant, the pH and the concentration ofp-toluidine. Both the trimer and tetramer are definitively characterised by X-ray single crystal structure determination.
    Journal of Chemical Research 01/2014; · 0.70 Impact Factor
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    ABSTRACT: In the title compound, CHClNOS, the dihedral angle between the aromatic rings is 6.62 (2)° and the C=N-N=C torsion angle is 176.2 (4)°. The thia-zine ring shows an envelope conformation, with the S atom displaced by 0.633 (6) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.037 Å). The Cl atom is an an axial conformation and is displaced by 2.015 (6) Å from the thia-zine ring plane. In the crystal, mol-ecules are linked by C-H⋯O inter-actions, generating a three-dimensional network. Very weak aromatic π-π stacking inter-actions [centroid-centroid separations = 3.928 (2) Å] are also observed.
    Acta Crystallographica Section E Structure Reports Online 03/2013; 69(Pt 3):o422-3. · 0.35 Impact Factor
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    Ola K Sakka, Daisy H Fleita, William T A Harrison
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    ABSTRACT: In the title compound, CHNOS, the essentially planar thia-zole ring (r.m.s. deviation = 0.022 Å) forms dihedral angles of 84.88 (9) and 1.8 (3)° with the phenyl ring and the -C(CN) group (r.m.s. deviation = 0.003 Å), respectively. The mol-ecule has approximate local symmetry. In the crystal, molecules are linked C-H⋯N hydrogen bonds, forming chains propagating along [101]. The crystal studied was found to be an inversion twin with a refined 0.63 (1):0.37 (1) domain ratio.
    Acta Crystallographica Section E Structure Reports Online 03/2013; 69(Pt 3):o350. · 0.35 Impact Factor
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    S. Ahmad, M. Shafiq, M.N. Tahir, W.T.A. Harrison, I.U. Khan
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    ABSTRACT: In the title compound, C16H13Cl2N3O2S, the dihedral angle between the aromatic rings is 6.62 (2)° and the C=N—N=C torsion angle is 176.2 (4)°. The thia­zine ring shows an envelope conformation, with the S atom displaced by 0.633 (6) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.037 Å). The Cl atom is an an axial conformation and is displaced by 2.015 (6) Å from the thia­zine ring plane. In the crystal, mol­ecules are linked by C—H⋯O inter­actions, generating a three-dimensional network. Very weak aromatic π–π stacking inter­actions [centroid–centroid separations = 3.928 (2) Å] are also observed.
    Acta Crystallographica Section E Structure Reports Online 02/2013; 69(3). · 0.35 Impact Factor
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    O.K. Sakka, D.H. Fleita, W.T.A. Harrison
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    ABSTRACT: In the title compound, C12H7N3OS, the essentially planar thia­zole ring (r.m.s. deviation = 0.022 Å) forms dihedral angles of 84.88 (9) and 1.8 (3)° with the phenyl ring and the –C(CN)2 group (r.m.s. deviation = 0.003 Å), respectively. The mol­ecule has approximate local Cs symmetry. In the crystal, molecules are linked via C—H⋯N hydrogen bonds, forming chains propagating along [101]. The crystal studied was found to be an inversion twin with a refined 0.63 (1):0.37 (1) domain ratio.
    Acta Crystallographica Section E Structure Reports Online 02/2013; 69(3). · 0.35 Impact Factor
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    ABSTRACT: In the title compound, C(17)H(16)BrN(3)O(2)S, the dihedral angle between the aromatic rings is 1.24 (15)° and the C=N-N=C torsion angle is 167.7 (3)°. The conformation of the thia-zine ring is an envelope, with the S atom displaced by 0.805 (3) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.027 Å). In the crystal, C-H⋯O inter-actions link the mol-ecules into C(10) [010] chains. A weak C-H⋯π inter-action is also observed.
    Acta Crystallographica Section E Structure Reports Online 02/2013; 69(Pt 2):o164. · 0.35 Impact Factor
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    ABSTRACT: In the title compound, C(18)H(16)ClN(3)O(2)S, the dihedral angle between the aromatic rings is 4.81 (2)° and the alkyl chain takes on an extended conformation [N-C-C-C = 179.2 (4)°]. The conformation of the thia-zine ring is an envelope, with the S atom displaced by -0.805 (3) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.046 Å). The Cl atom is an axial conformation and is displaced by 1.761 (4) Å from the thia-zine ring plane. In the crystal, inversion dimers linked by pairs of C-H⋯O inter-actions generate R(2) (2)(20) loops and further C-H⋯O hydrogen bonds link the dimers into (001) sheets. Weak aromatic π-π stacking inter-actions [centroid-centroid separations = 3.870 (3) and 3.883 (3) Å] are also observed.
    Acta Crystallographica Section E Structure Reports Online 02/2013; 69(Pt 2):o165. · 0.35 Impact Factor
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    ABSTRACT: In the title compound, C(19)H(21)N(3)O(2)S, the dihedral angle between the aromatic rings is 6.7 (2)° and the C=N-N=C torsion angle is 178.0 (2)°. The conformation of the thia-zine ring is an envelope, with the S atom displaced by 0.802 (2) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.022 Å). In the crystal, mol-ecules are linked by C-H⋯O inter-actions, generating C(5) chains propagating in [010]. A weak C-H⋯π inter-action is also observed.
    Acta Crystallographica Section E Structure Reports Online 02/2013; 69(Pt 2):o200. · 0.35 Impact Factor
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    ABSTRACT: In the title compound, C18H16ClN3O2S, the dihedral angle between the aromatic rings is 4.81 (2)° and the alkyl chain takes on an extended conformation [N—C—C—C = 179.2 (4)°]. The conformation of the thia­zine ring is an envelope, with the S atom displaced by −0.805 (3) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.046 Å). The Cl atom is an axial conformation and is displaced by 1.761 (4) Å from the thia­zine ring plane. In the crystal, inversion dimers linked by pairs of C—H⋯O inter­actions generate R22(20) loops and further C—H⋯O hydrogen bonds link the dimers into (001) sheets. Weak aromatic π–π stacking inter­actions [centroid–centroid separations = 3.870 (3) and 3.883 (3) Å] are also observed.
    Acta Crystallographica Section E Structure Reports Online 01/2013; 69(2). · 0.35 Impact Factor
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    ABSTRACT: Four trans-palladium(II)- and trans-platinum(II)-chlorido complexes, trans-[PdCl(2)(2-hmpy)(2)] (1), trans-[PtCl(2)(2-hmpy)(2)] (2), trans-[PdCl(2)(2-hepy)(2)] (3) and trans-[PtCl(2)(2-hepy)(2)] (4) (2-hmpy = 2-(hydroxymethyl)pyridine and 2-hepy = 2-(2-hydroxyethyl)pyridine), have been synthesized and characterized by elemental analysis, IR, NMR, and X-ray diffraction. The binding properties of these complexes with fish sperm DNA (FS-DNA) were investigated by UV titration, viscosity, thermal denaturation and electrophoresis measurements. The complexes can bind to FS-DNA and complex 4 exhibits the highest binding constant. Gel electrophoresis assay demonstrates that all the complexes can cleave the pCMV-βgal plasmid DNA to a different degree. The cytotoxic activities of the complexes were tested against four different cancer cell lines. In general, the platinum(II) complexes are more effective than the isostructural palladium(II) complexes. Complex 4 shows high anticancer activity, compared to transplatin, cisplatin, carboplatin and oxaliplatin.
    European journal of medicinal chemistry 12/2012; 60C:386-394. · 3.27 Impact Factor
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    ABSTRACT: In the title compound, C(16)H(13)BrFN(3)O(2)S, the dihedral angle between the aromatic rings is 2.55 (19)° and the C=N-N=C torsion angle is 178.9 (3)°. The conformation of the thia-zine ring is an envelope, with the S atom displaced by -0.811 (3) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.042 Å). In the crystal, C-H⋯O inter-actions link the mol-ecules and weak aromatic π-π stacking between the fluoro-benzene and bromo-benzene rings [centroid-centroid separation = 3.720 (2) Å and inter-planar angle = 2.6 (2)°] is also observed.
    Acta Crystallographica Section E Structure Reports Online 10/2012; 68(Pt 10):o2851. · 0.35 Impact Factor

Publication Stats

873 Citations
578.82 Total Impact Points

Institutions

  • 1999–2014
    • University of Aberdeen
      • Department of Chemistry
      Aberdeen, Scotland, United Kingdom
  • 2013
    • Government College University Faisalabad
      • Department of Chemistry
      Faisalābād, Punjab, Pakistan
    • Gomal University
      • Department of Chemistry
      Dera Ismāīl Khān, North West Frontier Province, Pakistan
    • The American University in Cairo
      • Department of Chemistry
      Cairo, Muhafazat al Qahirah, Egypt
  • 2012
    • Government College University, Lahore
      • Department of Chemistry
      Lahore, Punjab, Pakistan
    • Uludag University
      • Department of Chemistry
      United States
  • 1993–2010
    • University of Houston
      • Department of Chemistry
      Houston, Texas, United States
  • 1988–2010
    • University of California, Santa Barbara
      • • Department of Chemistry and Biochemistry
      • • Materials Research Laboratory
      Santa Barbara, California, United States
  • 2008
    • University of Southampton
      • Faculty of Natural and Environmental Sciences
      Southampton, ENG, United Kingdom
    • Gorgan University of Agricultural Sciences and Natural Resources
      • Department of Soil Sciences
      Asterābād, Golestān, Iran
  • 2007
    • St Aloysius College
      Mangalur, Karnātaka, India
  • 2002–2005
    • Federal University of Rio de Janeiro
      • Departamento de Química Inorgânica
      Rio de Janeiro, Rio de Janeiro, Brazil
  • 1997–2005
    • University of Western Australia
      • School of Chemistry and Biochemistry
      Perth, Western Australia, Australia
  • 2004
    • University of the West of Scotland
      Пейсли, Scotland, United Kingdom
  • 2001–2004
    • Ondokuz Mayıs Üniversitesi
      • Faculty of Arts and Sciences
      Djanik, Samsun, Turkey
    • University of St Andrews
      • School of Chemistry
      Saint Andrews, SCT, United Kingdom
  • 1995
    • National Institute of Standards and Technology
      Maryland, United States
  • 1985–1992
    • University of Oxford
      • Inorganic Chemistry Laboratory
      Oxford, England, United Kingdom