Figure 3
TMPYME. ORTEPII (Johnson, 1976) diagram of a single layer showing the hydrogen-bonding scheme; 50% probability ellipsoids are shown. Pyrene A is at general positions and is (essentially) coplanar with the TMA and the hydroxyls of the methanol molecules; pyrene B, which extends out of the plane of the page between the layers, is located about centres of symmetry. The crystallographically independent TMA molecules are designated A and B. Adjacent layers are mutually offset, the degree depending on whether they are separated by pyrene B or methanol methyls. |