Abstract
2-bromobenzo[b]indeno[1,2-e]pyran crystallizes in the monoclinic system: space groupP21/c,a = 7·508,b = 5·959,c= 26·172 Å, β = 92·55 °. The structure has been determined by the heavy-atom method and refined by full-matrix least squares toR = 0·072 for 1027 observed reflections.
The molecule is non-planar; the maximum deviations from the best plane occur at both ends of the length of the molecule, which results in distortion of the central portion from the expected geometry. The closest approach of two molecules, those related by a 21 axis, is 3·5 Å.
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Ladd, M.F.C., Povey, D.C. Crystal and molecular structure of 2-bromobenzo[b]indeno[1,2-e]pyran. Journal of Crystal and Molecular Structure 2, 243–250 (1972). https://doi.org/10.1007/BF01246641
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DOI: https://doi.org/10.1007/BF01246641