Diethyl 2,5-diphenylfuran-3,4-dicarboxylate
نویسندگان
چکیده
In the title compound, C(22)H(20)O(5), the substituted benzene rings are twisted away from the furan ring, making dihedral angles of 54.91 (14) and 20.96 (15)° with the furan ring. The dihedral angle between the two benzene rings is 46.89 (13)°. One ethyl group of one eth-oxy-carbonyl unit is disordered over two sets of sites with occupancies of 0.56 (12) and 0.44 (12). In the crystal, weak intra-molecular C-H⋯O hydrogen bonds link the mol-ecules into chains along the c axis.
منابع مشابه
Diethyl 2,5-bis[(1E)-(1H-pyrrol-2-ylmethylidene)amino]thiophene-3,4-dicarboxylate
In the crystal structure of the title compound, C(20)H(20)N(4)O(4)S, the azomethine group adopt E conformations. The pyrrole units are twisted by 10.31 (4) and 18.90 (5)° with respect to the central thio-phene ring. The three-dimensional network is close packed and involves N-H⋯O, N-H⋯N, C-H⋯N and C-H⋯O hydrogen bonding.
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The title compound, C(20)H(18)N(2)O(6)S, crystallizes as two independent mol-ecules that are disposed about a pseudo-inversion center (1/2, 1/4, 1/8). The mean planes of the two terminal furyl rings are twisted with respect to the central thio-phene ring by 7.33 (4) and 21.74 (5)° in one mol-ecule, and by 6.91 (4) and 39.80 (6)° in the other.
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In the title compound, C14H16O4S2, the thieno[2,3-b]thio-phene ring systems are planar [maximum deviation = 0.008 (2) Å]. The mol-ecular conformation is stabilized by intra-molecular C-H⋯O hydrogen bonds, while the crystal packing is stabilized by C-H⋯O, C-H⋯π and π-π stacking [centroid-centroid distance = 3.6605 (14) Å] inter-actions, which lead to supra-molecular layers in the ab plane.
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In the title compound, C(18)H(20)O(8)S(2), the dihedral angle between the two thio-phene rings is 2.33 (7)°. The methyl C atoms of the ester groups are disordered over two positions; the site-occupancy factors of the terminal methyl C atoms are 0.632 (18):0.368 (18) and 0.623 (17):0.377 (17). The mol-ecular structure is stabilized by weak intra-molecular C-H⋯O inter-actions and the crystal stru...
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