X-Ray analysis of (Z)-2-p-methoxyphenylmethylenebenzofuran-3(2H)-one
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 15,p. 1455-1457
- https://doi.org/10.1039/p19750001455
Abstract
The X-ray structure of the title compound (1; R = H, Ar =p-MeO·C6H4) establishes that aurones are planar molecules and confirms the (Z)-configuration assigned to naturally occurring and synthetic aurones from a correlation of dipole-moment measurements with their characteristic i.r. spectra. Crystals are monoclinic, space group P21/c with a= 12.005(1), b= 3.916(1), c= 27.184(2)Å, β= 106.4°. The structure was solved from diffractometer data by direct methods and refined by block diagonal least-squares methods to R 4.3 % for 1875 observed reflections.Keywords
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