J
John A. Cowan
Researcher at Durham University
Publications - 11
Citations - 308
John A. Cowan is an academic researcher from Durham University. The author has contributed to research in topics: Hydrogen bond & Bond length. The author has an hindex of 6, co-authored 11 publications receiving 295 citations.
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Journal ArticleDOI
On the Interaction between N‐Heterocyclic Carbenes and Organic Acids: Structural Authentication of the First N−H⋅⋅⋅C Hydrogen Bond and Remarkably Short C−H⋅⋅⋅O Interactions
John A. Cowan,Jason A. C. Clyburne,Matthew G. Davidson,R. Luke W. Harris,Judith A. K. Howard,Patrick Küpper,Michael A. Leech,Stephen P. Richards +7 more
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Variable-temperature neutron diffraction studies of the short, strong N...O hydrogen bonds in the 1:2 co-crystal of benzene-1,2,4,5-tetracarboxylic acid and 4,4'-bipyridyl.
TL;DR: The 1:2 adduct of benzene-1,2,4,5-tetracarboxylic acid and 4,4'-bipyridyl at 100 K has been studied by single-crystal neutron diffraction at 20, 200 and 296 K and the structure contains two short, strong N...O hydrogen bonds.
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Variable-temperature neutron diffraction studies of the short, strong hydrogen bonds in the crystal structure of pyridine-3,5-dicarboxylic acid.
TL;DR: Pyridine-3,5-dicarboxylic acid has been studied by single-crystal neutron diffraction at 15 and 296 K and in the deuterated structure the overall hydrogen-bond length increased and the magnitude of the migration increased.
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Structure and Bonding of the Vanadium(III) Hexa-Aqua Cation. 1. Experimental Characterization and Ligand-Field Analysis
Philip L. W. Tregenna-Piggott,David Spichiger,Graham Carver,Beatrice Frey,Roland Meier,Høgni Weihe,John A. Cowan,Garry J. McIntyre,G. Zahn,Anne-Laure Barra +9 more
TL;DR: Spectroscopic and crystallographic data are presented for salts containing the [V(OH(2))(6)](3+) cation, providing a rigorous test of the ability of the angular overlap model (AOM) to inter-relate the electronic and molecular structure of integer-spin complexes.
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Aqua Ions. 2. Structural manifestations of the Jahn-Teller effect in the beta-alums.
Philip L. W. Tregenna-Piggott,Hanspeter Andres,Garry J. McIntyre,Stephen P. Best,Chick C. Wilson,John A. Cowan +5 more
TL;DR: In this article, variable-temperature single-crystal neutron diffraction structures of the alums CsMIII(SO4)2·12D2O, where MIII = Ti, V, Mn, and Ga, are reported.