6,7-Difluoro-1,2,3,4-tetrahydroquinoxaline-5,8-dicarbonitrile
نویسندگان
چکیده
In the title compound, C10H6F2N4, the Car-N bonds are slightly shortened with respect to a standard aniline C-N bond [1.3580 (16) and 1.3618 (16) versus 1.39 Å], thus indicating some π-π conjgation with the electron-acceptor CN groups. The mol-ecule, except for two C atom of the ethyl-ene bridge, is nearly planar, the largest deviation of the other non-H atoms from the mean plane being 0.309 (2) Å. The N-C-C-N torsion angle involving the ethyl-ene bridge is 50.23 (18)°. In the crystal, mol-ecules are connected by pairs of N-H⋯N hydrogen bonds into chains along [21-1].
منابع مشابه
rac-1,2,3,4-Tetrahydro-1,4-methanoanthracene-6,7-dicarbonitrile
The title compound, C(17)H(12)N(2), comprises a norbornane unit having a dicyanona-phthalene ring fused on one side. Both cyano groups are twisted slightly out of the plane of the naphthalene ring system [C-C-C-C torsion angle = 1.9 (2)°]. In the crystal, inversion-related mol-ecules are linked by pairs of weak C-H⋯N hydrogen bonds, forming dimers.
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عنوان ژورنال:
دوره 69 شماره
صفحات -
تاریخ انتشار 2013