Crystal structure of 4'-O-methylalpinumisoflavone at 90K

R. Kingsford-Adaboh, E. Ahiano, B. Dittrich, H. Okamoto, M. Kimura, H. Ishida

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


4'-O-Methylalpinumisoflavone crystals which hitherto had been difficult to crystallize for X-ray diffraction analyses have been obtained from a demethylated product of O, O- dimethylalpinumisoflavone. The structural and conformational features of the crystal measured at 90 K are reported and compared with previously reported work of O,O-dimethylalpinumisoflavone and 5-O-methyl-4'-O-(3-methyl-but-2-en-1-yl) alpinumiso-flavone. Each of these compounds is characterized by a six membered ring that is further fused to a benzopyrone isoflavone moiety resulting in a tricyclic ring system. This six membered ring shows a half-chair conformation in all the molecules studied, with the ring in the title compound showing the least Cremer-Pople puckering amplitude Q and shorter inter and intramolecular contacts.

Original languageEnglish
Pages (from-to)728-733
Number of pages6
JournalCrystal Research and Technology
Issue number7
Publication statusPublished - Jul 1 2006


  • Crystal structure
  • Demethylation
  • Extraction
  • Low temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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