Acta Crystallographica Section C

Crystal Structure Communications

Volume 59, Part 9 (September 2003)

organic compounds

Acta Cryst. (2003). C59, o520-o522 [ doi:10.1107/S0108270103012459 ]

A mixed crystal of imperatorin and phellopterin, with C-HO, C-H and - interactions

P. J. Cox, M. Jaspars, Y. Kumarasamy, L. Nahar, S. D. Sarker and M. Shoeb

Abstract: The crystal structure of 9-(3-methylbut-2-enyloxy)-7H-furo[3,2-g]chromen-7-one-4-methoxy-9-(3-methylbut-2-enyloxy)-7H-furo[3,2-g]chromen-7-one (0.926/0.074), 0.926C₁₆H₁₄O₄·0.074C₁₇H₁₆O₅, is characterized by two independent imperatorin molecules in the asymmetric unit, which exhibit different side-chain conformations. A small amount of phellopterin overlaps with one of the two imperatorin molecules. The supramolecular structure is supported by C-HO, C-H [pi] and [pi] - [pi] interactions.

Formula: 0.926C₁₆H₁₄O₄·0.074C₁₇H₁₆O₅