1. Department of Chemistry
2. University of York
3. York YO10 5DD
4. UK
5. Centro de Química Estrutural
6. IST
7. Universidade de Lisboa
8. 1049-001 Lisboa
9. Portugal
10. ILL
11. Grenoble Cedex 9
12. France
13. ISIS
14. Science & Technology Facilities Council
15. Rutherford Appleton Laboratory