7-Diethylamino-3-dimethylamino-2H-1-benzopyran-2-one

Abstract

Key indicatorsSingle-crystal X-ray study T = 123 K Mean (C-C) = 0.004 Å R factor = 0.057 wR factor = 0.162 Data-to-parameter ratio = 9.4For details of how these key indicators were automatically derived from the article, see

Methyl 4-(7-diethylamino-2-oxo-2H-1-benzopyran-3-yl)benzoate

“…Coumarin derivatives have been found to be very useful as fluorescence materials and laser dyes, nonlinear optical materials, photorefractive materials, photo resists, intermediates for drug synthesis, luminescence materials, analytical reagents, etc. (Takahashi et al, 2005). Recently, we have reported the synthesis and fluorescence properties of 7diethylaminocoumarin derivatives as fluorophores accessible for analytical purposes in the fields of analytical and biological chemistry (Takechi et al, 2000).…”

Crystal Structure and Emission Properties of 4,4'-Dimethoxy-2,2'-dihydroxybenzalazine

“…ii (ii: 3/2-x, -1/2+y, 3/2-z) and the centroid (Cg) of the benzene ring (C1-C6) is 2.707 Å, which is shorter than the intramolecular C-H p interaction [3.09 Å] observed in 7-diethylamino-3-dimethylamino-2H-1-benzo-pyran-2-one (19). By contrast, there are no C-H p interactions observed in the crystal lattice of 4,4'-dioctyloxy-2,2'-dihydroxy-benzalazine (14).…”

Crystal Structure of 7-(Dimethylamino)-2<i>H</i>-1-benzopyran-2-one

“…Intermolecular C-H·p and C-H·O interactions are observed inthecrystalstructureof1(Table3andFig.3),withdistances thataretypicalforthosetypesofinteractions:C-H·pinteraction =2.8-3.1Å [4][5][6] andC-H·Ointeraction=2.4-2.7Å. [4][5][6] Intermolecularp·pinteractionsbetweenthecoumarinplanes are shown in Fig.…”