The synthesis of [18]annulene 1,4-Oxide-7,10:13,16-disulphide

Abstract
[18]Annulene 1,4-oxide-7,10:13,16-disulphide has been synthesized. It has been found to be a stable system; but its spectral characteristics indicate that it is non-aromatic and that the three heterocyclic rings are linked by three essentially olefinic vinylene groups.

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