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The title compounds, C 24 H 18 O 2 and C 24 H 17 FO 2 , were synthesized using the Claisen-Schmidt condensation method and characterized by UV-Vis spectroscopy. Weak inter-molecular C-H⋯O, C-H⋯π and π-π hydrogen-bonding inter-actions help to stabilize the crystal structures of both compounds. The geometrical parameters obtained from the mol-ecular structure were optimized using density functional theory (DFT) calculations at the B3LYP/6-311++G(d,p) level, showing a good correlation with the experimental results. The small HOMO-LUMO energy gaps of 3.11 and 3.07 eV enhances the non-linear responses of these mol-ecular systems.

acta crystallographica. section e, crystallographic communications

Molecular structure, DFT studies and UV–Vis absorption of two new linear fused ring chalcones: (<i>E</i>)-1-(anthracen-9-yl)-3-(2-methoxyphenyl)prop-2-en-1-one and (<i>E</i>)-1-(anthracen-9-yl)-3-(3-fluoro-4-methoxyphenyl)prop-2-en-1-one

Molecular structure, DFT studies and UV–Vis absorption of two new linear fused ring chalcones: (E)-1-(anthracen-9-yl)-3-(2-methoxyphenyl)prop-2-en-1-one and (E)-1-(anthracen-9-yl)-3-(3-fluoro-4-methoxyphenyl)prop-2-en-1-one