SCHEDULED MAINTENANCE
X-Ray diffraction of the title compound shows that the molecule is planar. The bond lengths of the central cyclopenta[b]pyran system indicate pronounced bond alternation and hence little aromatic character. The results of ωβ-calculations are in good agreement with the experimental bond distances.
M. F. C. Ladd, D. C. Powey, G. V. Boyd and F. W. Clark, J. Chem. Soc., Perkin Trans. 2, 1979, 209 DOI: 10.1039/P29790000209
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