Die Molekular- und Kristallstruktur von trans-δ-[p-Methoxystyryl]-4-methoxy-α-pyron (Yangonin) C15H14O4 *

P. Engel and W. Nowacki


The crystalline form of trans-δ-[p-methoxystyryl]-4-methoxy-α-pyron is assigned to space group P21/cC2h5 having parameters a = 7.313, b = 7.480, c = 23.721 Å and β = 94°21′. The crystal structure was found from the Patterson diagramm using the special symmetry of the space group P21/c. The refinement by the block-diagonal-matrix least squares led to a R value of 0.07 using 2256 reflections. The molecules are approximately planar and are held together by van der Waals forces only.

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Zeitschrift für Kristallographie – Crystalline Materials offers a place for researchers to present results of their crystallographic studies. The journal includes theoretical as well as experimental research. It publishes Original Papers, Letters and Review Articles in manifold areas of crystallography.