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3,5,7-Trimeth-oxy-2-(4-methoxy-phen-yl)-4H-1-benzopyran-4-one.

ABSTRACT: In the title compound, C(19)H(18)O(6), also known as 3,4',5,7-tetra-methoxy-flavone, the dihedral angle between the benzopyran-4-one group and the attached benzene ring is 11.23?(8)°. An intra-molecular C-H?O hydrogen bond generates an S(6) ring motif. In the crystal, mol-ecules are linked into a two-dimensional network parallel to (01) by inter-molecular C-H?O hydrogen bonds, which generate R(4) (4)(20), R(4) (4)(12) and R(2) (2)(14) ring motifs. Adjacent networks interact by ?-? inter-actions between the pyran ring and its methoxy-phenyl substituent [centroid-centroid distance = 3.5267?(8)?Å].

SUBMITTER: Aree T 

PROVIDER: S-EPMC2971014 | biostudies-literature | 2009 Oct

REPOSITORIES: biostudies-literature

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3,5,7-Trimeth-oxy-2-(4-methoxy-phen-yl)-4H-1-benzopyran-4-one.

Aree Thammarat T   Sawasdee Pattara P  

Acta crystallographica. Section E, Structure reports online 20091010 Pt 11

In the title compound, C(19)H(18)O(6), also known as 3,4',5,7-tetra-methoxy-flavone, the dihedral angle between the benzopyran-4-one group and the attached benzene ring is 11.23 (8)°. An intra-molecular C-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, mol-ecules are linked into a two-dimensional network parallel to (01) by inter-molecular C-H⋯O hydrogen bonds, which generate R(4) (4)(20), R(4) (4)(12) and R(2) (2)(14) ring motifs. Adjacent networks interact by π-π inter-actions  ...[more]

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