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3-(3-Meth-oxy-benzyl-idene)chroman-4-one.

ABSTRACT: In the title compound, C(17)H(14)O(3), the dihedral angle between the meth-oxy-benzene unit and the benzene ring of the chromanone system is 64.12 (3)°. The crystal structure is stabilized by weak C-H⋯O inter-actions.

SUBMITTER: Gopaul K

PROVIDER: S-EPMC3343972 | biostudies-literature |

REPOSITORIES: biostudies-literature

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8-Meth-oxy-3-(4-methyl-benzyl-idene)-6-(prop-1-en-yl)chroman-4-one.

Project description:In the title compound, C(21)H(20)O(3), the tolyl ring makes a dihedral angle of 31.11 (6)° with the benzene ring of the chromanone unit. The pyrone ring adopts a half-chair conformation. The mol-ecular structure is stabilized by a weak intra-molecular C-H⋯O inter-action and the crystal packing is stabilized by weak inter-molecular C-H⋯O inter-actions and a C-H⋯π inter-action.

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(E)-2-[4-(Trifluoro-meth-oxy)benzyl-idene]indan-1-one.

Project description:In the title compound, C(17)H(11)F(3)O(2), the dihydro-indene ring is approximately planar with a maximum deviation of 0.024?(2)?Å and makes a dihedral angle of 3.17?(8)?Å with the adjacent benzene ring. In the crystal, mol-ecules are inter-connected by C-H?O inter-actions, forming an infinite chain along the c axis.

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