Diethyl 2-[(1-methyl-1H-pyrrol-2-yl)methyleneamino]-5-(2-thienylmethyleneamino)thiophene-3,4-dicarboxylate
نویسندگان
چکیده
Both imine bonds of the title compound, C(21)H(21)N(3)O(4)S(2), were found to be in the E configuration. The terminal pyrrole and thio-phene rings are twisted by 2.5 (3) and 2.3 (2)°, respectively, from the mean plane of the central thio-phene to which they are attached. The structure is disordered by exchange of the terminal heterocyclic rings; the site occupancy factors are ca 0.8 and 0.2. The crystal packing involves some π-π stacking [3.449 (4) Å between pyrrole and terminal thio-phene rings].
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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