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- W3145947721 abstract "The title compounds have been synthesized via a three-component reaction and their structures were characterized by IR,1H NMR,13C NMR and X-ray single-crystal diffraction. The crystal of compound 4a belongs to monoclinic,space group P121/c1 with a = 8.575(3),b = 9.590(3),c = 21.431(6) ,β = 91.172(3)°,V = 1762.1(9) 3,Mr = 393.36,Z = 4,Dc = 1.483 g/cm3,μ(MoKα) = 0.113 mm–1,F(000) = 816,the final R = 0.0366 and wR = 0.0941. The crystal of compound 4b is of triclinic,space group P-1 with a = 8.6420(17),b = 9.761(2),c = 11.132(2),α = 97.51(3),β = 97.86(3),γ = 92.85(3)°,V = 920.1(3) 3,Mr = 393.36,Z = 2,Dc = 1.420 g/cm3,μ(MoKα) = 0.108 mm–1,F(000) = 408,the final R = 0.0612 and wR = 0.1781. In each molecular structure,the naphthalene rings and pyran rings are almost coplanar with the latter in an envelope conformation. The rings formed by the N–H···O intramolecular hydrogen bonds are almost planar in these compounds. Their crystal packing is stabilized by intermolecular hydrogen bonds together with C–H···π and π-π stacking interactions." @default.
- W3145947721 created "2021-04-13" @default.
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- W3145947721 date "2009-01-01" @default.
- W3145947721 modified "2023-09-25" @default.
- W3145947721 title "Crystal Structure of 2-Amino-5,10-dioxo-4-aryl-5,10-dihydro-4H-naphtho [2,3-b]pyran-3-carboxylic Acid Ethyl Ester" @default.
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