Diethyl 2,5-bis[(1E)-(1H-pyrrol-2-ylmethylidene)amino]thiophene-3,4-dicarboxylate
نویسندگان
چکیده
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.
منابع مشابه
Diethyl 2,5-bis[(E)-2-furylmethyleneamino]thiophene-3,4-dicarboxylate
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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The asymmetric unit of the title compound, C(30)H(27)N(2)O(4)PS(2), consists of two crystallographically independent mol-ecules. The thieno[2,3-b]thio-phene ring systems are planar. One of the terminal ethyl groups is disordered over two positions; the site occupancy factors are ca 0.7 and 0.3. The crystal structure is stabilized by N-H⋯N, N-H⋯O and C-H⋯O hydrogen bonds.
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