a Dept. of Chemistry, University of Canterbury, Christchurch 1, N.Z., U.K.
b Open University, 40 University Road, Belfast BT7 1SU U.K.
c Dept. of Chemistry, Queen's University, Belfast, BT9 5AG U.K.
Abstract:
X-ray crystallographic structure determination of the macrobicyclic cyclophane L1 reveals a compact structure involving close edge-to-face approach of aromatic rings; 1H nmr shows that this is also the solution conformation.