7,7′,8,8′-Tetramethoxy-4,4′-dimethyl-3,5′-bichromene-2,2′-dione
2009 ◽
Vol 65
(6)
◽
pp. o1322-o1323
◽
Keyword(s):
The Mean
◽
In the title molecule, C24H22O8, the mean planes of the two coumarin units are inclined to each other at a dihedral angle of 79.93 (3)°. The attached methoxy groups form torsion angles of 7.65 (19) and 78.36 (14)° with respect to one coumarin unit, and angles of 9.01 (16) and 99.08 (11)° with respect to the other coumarin unit. In the crystal structure, weak intermolecular C—H...O hydrogen bonds connect pairs of molecules to form dimers, generatingR22(16) andR22(18) rings; the dimers are linked by further weak intermolecular C—H...O hydrogen bonds, forming extended chains. Additional stabilization is provided by weak C—H...π interactions.
2015 ◽
Vol 71
(12)
◽
pp. o935-o936
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Keyword(s):
2017 ◽
Vol 73
(1)
◽
pp. 56-58
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Keyword(s):
2012 ◽
Vol 68
(8)
◽
pp. o2491-o2491
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Keyword(s):
Crystal structure of (Z)-ethyl 3-[2-(5-methyl-7-nitro-1H-indole-2-carbonyl)hydrazinylidene]butanoate
2015 ◽
Vol 71
(9)
◽
pp. o684-o685
Keyword(s):
The Mean
◽
2012 ◽
Vol 68
(8)
◽
pp. o2440-o2440
Keyword(s):