(5Z,7Z,9Z)-5,10-Dibromobenzo[8]annulene
نویسندگان
چکیده
In the structure of the title compound, C12H8Br2, the two bromine substituents are oriented exo to the boat-shaped cyclo-octa-tetra-ene at the two ring sites that are β to the ring fusion positions. The average Br-C bond distance is 1.919 (2) Å, the average distance for C=C double bonds that are Br substituted is 1.328 (2) Å, while the other two double-bond distances are 1.327 (2) and 1.398 (2) Å for the non-fused and fused bonds, respectively. Each type of ring inter-atomic distance is within s.u. of the average values for the four known structures, including the title compound, of benzo-fused cyclo-ocata-tetra-enes that are not coordinated to a metal atom. The crystal structure features short Br⋯Br [3.6620 (3) Å] and C⋯H [2.834 (2) and 2.841 (2) Å] contacts.
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