A high-pressure study of N,N'-dimethylurea

DOI

This proposal seeks to explore the high-pressure structural behaviour of N,N¿-dimethylurea. Two new high-pressure forms have been structurally characterised using x-ray methods, but the accurate location of hydrogen atoms remains challenging. Such a relatively simple system also lends itself to crystal structure prediction (CSP) methodologies and so CSP calculations have been performed in order to explore fully the phase behaviour of N,N¿-dimethylurea. All four experimental forms are identified by the calculations, but as usual with such calculations numerous structures with very similar lattice energies are predicted. The challenge is to discriminate between these structures and identify which are in fact plausible, experimentally accessible structures. The study will therefore explore whether there are other forms accessible at higher pressures and at higher/lower temperatures.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24079514
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24079514
Provenance
Creator Professor Colin Pulham; Dr Bill Marshall; Dr David Millar; Dr Devashi Adroja
Publisher ISIS Neutron and Muon Source
Publication Year 2013
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2010-03-06T12:55:23Z
Temporal Coverage End 2010-05-24T08:37:26Z