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1-Hydr-oxy-3-(3-methyl-but-2-en-yloxy)xanthone.

ABSTRACT: In the title compound, C(18)H(16)O(4), a monoprenylated xanthone, the xanthone skeleton exhibits an essentially planar conformation (r.m.s. deviation 0.0072?Å) and the isoprenyl side chain remains approximately in the mean plane of the xanthone unit, making a dihedral angle of 4.5?(2)°. The hydroxyl group forms an intra-molecular O-H?O hydrogen bond. Moreover, there is a weak inter-molecular C-H?O inter-action between a ring C atom and the xanthene O atom. In the crystal structure, there are no inter-molecular hydrogen bonds and the crystallographic packing is governed by van der Waals forces, leading to an arrangement in which the mol-ecules assemble with their planes parallel to each other, having a separation of 3.6?(3)?Å.

SUBMITTER: Gales L

PROVIDER: S-EPMC2971381 | biostudies-literature | 2009 Oct

REPOSITORIES: biostudies-literature

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1-Hydr-oxy-3-(3-methyl-but-2-en-yloxy)xanthone.

Gales Luis L Castanheiro Raquel A P RA Pinto Madalena M M MM Damas Ana M AM

Acta crystallographica. Section E, Structure reports online 20091013 Pt 11

In the title compound, C(18)H(16)O(4), a monoprenylated xanthone, the xanthone skeleton exhibits an essentially planar conformation (r.m.s. deviation 0.0072 Å) and the isoprenyl side chain remains approximately in the mean plane of the xanthone unit, making a dihedral angle of 4.5 (2)°. The hydroxyl group forms an intra-molecular O-H⋯O hydrogen bond. Moreover, there is a weak inter-molecular C-H⋯O inter-action between a ring C atom and the xanthene O atom. In the crystal structure, there are no ...[more]

PMID: 21578316

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