[3.3]Orthoparacyclophane (1), [4.4]orthoparacyclophane (2), and [3.3]orthometacyclophane (3) were synthesized via the corresponding dithiacyclophanes 4, 5, and 6, resp., by sulfone pyrolysis. The conformations of 1-3 are discussed on the basis of H-1-NMR and the X-ray analysis of dithia[4.4]orthometa = cyclphane 4 for which a perpendicular arrangement of the two aromatic rings was found.
[3.3]Orthoparacyclophane (1), [4.4]orthoparacyclophane (2), and [3.3]orthometacyclophane (3) were synthesized via the corresponding dithiacyclophanes 4, 5, and 6, resp., by sulfone pyrolysis. The conformations of 1-3 are discussed on the basis of H-1-NMR and the X-ray analysis of dithia[4.4]orthometa = cyclphane 4 for which a perpendicular arrangement of the two aromatic rings was found.