N,N′-Bis(2-thienylmethylene)benzene-1,4-diamine
نویسندگان
چکیده
The Schiff base, C(16)H(12)N(2)S(2), has been synthesized by refluxing an ethano-lic solution of thio-phene-2-carbaldehyde and benzene-1,4-diamine. The center of the benzene ring is located on a crystallographic center of inversion. The dihedral angle between the benzene and thio-phene rings is 63.6 (1)°.
منابع مشابه
N 1,N 4-Bis(2-thienylmethylene)cyclohexane-1,4-diamine
The title compound, C(16)H(18)N(2)S(2), lies about an inversion center with only half of the mol-ecule in the asymmetric unit. The cyclo-hexane ring adopts a chair conformation, and the terminal thio-phene rings are in a transoid orientation, with an S⋯S separation between the two terminal 2-thio-phene rings of 11.6733 (9) Å.
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In the title compound, C(20)H(18)N(4), the benzene ring lies about an inversion center. The central benzene-1,4-diamine unit is connected to two pyridine rings by the C=N imine bonds. The dihedral angle between the benzene and pyridine rings is 82.9 (1)°.
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The centrosymmetric title compound, C(22)H(20)N(2), crystallizes with one half-mol-ecule in the asymmetric unit. The dihedral angle between the central and outer benzene rings is 46.2 (2)°.
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The asymmetric unit of the title compound, 2C(16)H(14)N(4)·C(8)H(6)N(2), consits of one mol-ecule of N,N'-bis-(pyridin-2-yl)benzene-1,4-diamine (PDAB) and one half-mol-ecule of quinoxaline (QX) that is located around an inversion centre and disordered over two overlapping positions. The PDAB mol-ecule adopts a non-planar conformation with an E configuration at the two partially double exo C N b...
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