1994 Volume 23 Issue 12 Pages 2291-2294
A bismethano-bridged bisdehydroannulenone, tricyclo[220.127.116.11,11]tricosa-6,8,10,12,15,17,19,21-octaene-2,4-diyn-14-one, was synthesized. X-ray crystallography reveals the syn orientation of the two methano bridges. Two conformers are present in solution in a 97:3 ratio, the major isomer being the one existing in the crystalline state. Paratropicity of this compound in CDCl3 and in CF3CO2D is discussed.
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