Chem. Cryst., Oxford

Crystals

The Chemical Crystallography Group and X-ray Crystallography Facility are located in the Chemistry Research Laboratory, Mansfield Road, Oxford. X-ray crystallography was established in Oxford in 1929 and has been part of the Department of Chemistry since 1946.

In addition to world-class X-ray diffraction facilities, Chem. Cryst. has an active research group and is home to the CRYSTALS software project.  We also have a number of projects available for undergraduate Part II chemists in the coming year.

May 202020
 
Crystals 15.0.1 (v7809)

The CRYSTALS 15.0.1 (v7809) installer for Windows 7/10 is now available. This is a quick patch release following the release of v7795.

Please report problems. The version number refers to a specific snapshot of the source code enabling us to better identify and fix bugs.

Key changes between 15.7795 and 15.7809

This is a … Read the rest

Mar 122020
 
Increasing the performance, trustworthiness and practical value of machine learning models: a case study predicting hydrogen bond network dimensionalities from molecular diagrams (A.P. Frade, P. McCabe & R.I. Cooper)

CrystEngComm, 2020, DOI: 10.1039/D0CE00111B

The performance of a model is dependent on the quality and information content of the data used to build it. By applying machine learning approaches to a standard chemical dataset, we developed a 4-class classification algorithm that is able to predict the hydrogen bond network dimensionality that a molecule would … Read the rest

Oct 172019
 
A hexagonal planar transition-metal complex (M. Garçon, C. Bakewell, G. A. Sackman, A. J. P. White, R. I. Cooper, A. J. Edwards & M. R. Crimmin)

Nature 574, 390–393 (2019). [ doi: 10.1038/s41586-019-1616-2 ]

We report the isolation and structural characterization of a simple coordination complex in which six ligands form bonds with a central transition metal in a hexagonal planar arrangement. The structure contains a central palladium atom surrounded by three hydride and three magnesium-based ligands. This finding has … Read the rest

Aug 302018
 
Unexpected Behaviour in Derivatives of Barluenga's Reagent (L. C. F. Morgan, Y. Kim, J. N. Blandy, C. A. Murray, K. E. Christensen & A. L. Thompson)

Chemical Communications 2018, 54, 9849 – 9852 [doi:10.1039/C8CC05430D]

For the collidine analogues of Barluenga’s Reagent (IPy2BF4) reported, a flat cation is necessary for the generation of a modulated phase, in keeping with the “Ratchet Model” theory [Kim et al., Crystal Growth & Design, 2014, Read the rest

Aug 292018
 
ECM31, Oviedo and ECA Crystallographic Computing School, Mieres

The 31st European Crystallography Meeting was held in Oviedo, Spain from 22-26 August 2018.

During the meeting George Sackman presented a poster (MS10-P05) on recent neutron diffraction work with Richard Cooper and Alison EdwardsDisordered or not: A cautionary tale when inferring proton disorder solely from X-ray and computational data.

Richard Cooper gave a … Read the rest

Jul 182018
 
Crystals v6999

The CRYSTALS v6999 installer for Windows 7/10 is now available.

Please report problems. The version number (6999) refers to a specific snapshot of the source code enabling us to better identify and fix bugs.

Key changes between 14.6720 and 14.6999
Added some trial shortcut keys to the menus. Ctrl-O: open file dialog, Ctrl-R: setup … Read the rest

Jun 242018
 
An enhanced set of displacement parameter restraints in CRYSTALS (P. Parois, J. Arnold and R.I. Cooper)

Journal of Applied Crystallography, 2018, 51, 1059-1068. [ doi: 10.1107/S1600576718007100 ]

The implementation and use of a set of new displacement parameter restraints is described. Anisotropic displacement parameters account for a large proportion of the parameters in a crystallographic refinement, but very few restraints for conveniently controlling their values have been implemented in … Read the rest