electronic archive document Acta Crystallographica Section B Structural Science ISSN 0108-7681 Editor: Carolyn P. Brock Neutron Diffraction Study of Aromatic Hydrogen Bonds: 5-Ethynyl-5H-dibenzo[a,d]cyclohepten-5-ol at 20K T. Steiner, S. A. Mason and M. Tamm This electronic document was scanned from an archival copy of material deposited to accompany a paper published in an IUCr journal. In many cases the only accessible copy was a microfilm of a poor-quality original. Supplement to Acta Cryst. (1997). B53, 843–848 SUP83829