7,7′,8,8′-Tetramethoxy-4,4′-dimethyl-3,3′-bicoumarin
2009 ◽
Vol 65
(6)
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pp. o1294-o1295
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In the crystal structure, the title compound, C24H22O8, lies on a twofold rotation axis and the asymmetric unit comprises one half-molecule. The dihedral angle formed by the coumarin unit with the symmetry-related part is 74.78 (14)°. One of the methoxy groups attached to the coumarin unit is considerably twisted, making an angle of 87.17 (17)° with respect to the coumarin unit; the other is twisted by 0.66 (19)°. No classical hydrogen bonds are found in the sturcture; only a weak C—H...π interaction and short intramolecular O...O contacts [2.683 (2)–2.701 (2) Å] are observed.
2015 ◽
Vol 71
(6)
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pp. o425-o425
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2014 ◽
Vol 70
(9)
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pp. o917-o918
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2007 ◽
Vol 63
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pp. m892-m894
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2014 ◽
Vol 70
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pp. o1122-o1123
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2017 ◽
Vol 73
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pp. 1735-1738
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2009 ◽
Vol 65
(6)
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pp. o1331-o1331
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2007 ◽
Vol 63
(11)
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pp. o4374-o4375
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2015 ◽
Vol 71
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pp. o912-o913
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2014 ◽
Vol 70
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pp. o970-o970
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2015 ◽
Vol 71
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pp. 258-260
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