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8,8′-Methylenebis(7,10-dihydroxy-1,3,6,6-tetramethyl-3,4-dihydro-1H-benzo[g]isochromen-9-one)

✍ Scribed by Fun, Hoong-Kun ;Boonnak, Nawong ;Chantrapromma, Suchada

Publisher: International Union of Crystallography
Year: 2007
Tongue: English
Weight: 231 KB
Volume: 63
Category: Article
ISSN: 1600-5368
DOI: 10.1107/s160053680701611x

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✦ Synopsis

In the title compound, C 23 H 24 O 8 , the central methylene unit that links the two sets of fused rings lies on a crystallographic twofold rotation axis. The isochromene skeleton is not planar, with the pyran ring in an envelope conformation. Intra-and intermolecular O-HÁ Á ÁO hydrogen bonds and weak C-HÁ Á ÁO and C-HÁ Á Á interactions stabilize the crystal structure.

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