This website aims to draw together information concerning structures which crystallise with more than one molecule in the asymmetric unit, i.e. Z' > 1.
Please follow the links below or on the left for more details:
- What is Z' - An introduction to Z'
- Z' Limitations - A guide to some common pitfalls and problems with the definition of Z'
- Our Work - An overview of our research on structures with high Z'
- Database - A database of known structures with Z' > 4
- Literature - A selection of papers concerning the Z' phenomenon
- Submit - Please add to our database by submitting your unpublished high Z' structures
- Useful Links - Some useful websites
- Steed Research Group - A link to the Durham Supramolecular Chemistry group homepage
- 6/8/15 - The Z' world record has been broken! A recent report by Zentner and coworkers in Chem. Commum. entitled "High surface area and Z ' in a thermally stable 8-fold polycatenated hydrogen-bonded framework" reports a hydrogen bonded framework with Z' = 56, shattering the previous world record of 32 for Me3SnOH which had stood since 1965.
- 12/2/15 - A comprehensive review "Packing Problems: High Z' Crystal Structures and their Relationship to Cocrystals and Polymorphism", has just been published in Chem. Rev. 2015, doi: 10.1021/cr500564z.
- 02/09/14 - Site URL changed to zprime.co.uk. Updates added so that the site is complete for Z' > 4 up to the May 2014 CSD release (see Database). Literature section significantly expanded and further subdivided.
- 22/09/09 - Our paper "Designing Co-Crystals of Pharmaceutically Relevant Compounds That Crystallize with Z' > 1" is featured in the Virtual Issue on Pharmaceutical Co-crystals published in Crystal Growth & Design
We would like to thank Professor Len Barbour (University of Stellenbosch, South Africa) for his invaluable assistance.
We would also like to thank the EPSRC for funding (Grant Numbers: EP/D040329/1 and EP/E031153).
This site is dedicated to Dr. Andrés E. Goeta.
If you have any questions or queries about this site then please let us know.
If you have a high Z' structure which you would like to add to the database then please click here.
For more information on research in our group, please visit our research group homepage.