Abstract
Abstract[27] Metacyclophane, [29] metacyclophane, and [210] metacyclophane with a 50‐membered ring are isolated in the pure state from the crude product of a WURTZ reaction with m‐xylylene dibromide, thus providing for the first time a complete series of cyclophanes with two to ten sub‐units. The structure of the new ring systems is determined from their UV., IR., NMR. and mass spectra. The physical constants of these large carbocyclic systems are compared with those of the well‐known smaller metacyclophanes, particularly with respect to conformation.
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