9-[(E)-2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)ethenyl]-9H-carbazole
نویسندگان
چکیده
The title compound, C(20)H(22)BNO(2), is a simple olefinic compound which carries both B and N atoms that are trans to one another. The π-conjugated system of the compound is considered to be isoelectronic with 1,3-butadiene. There are two independent mol-ecules in the asymmetric unit in which the environments around the boron atoms are essentially planar (r.m.s. deviations of 0.0032 and 0.0021 Å for the BO(2)C planes). The dihedral angles of the olefinic planes with the boron planes are 5.70 (11) and 9.74 (9)°, respectively, while the dihedral angles of the olefinic planes with the carbazole planes are 19.37 (3) and 10.74 (6)°. These dihedral angles are consistent with those in 9-ethenylcarbazole and an ethenylboronic ester derivative. The N-Csp(2), B-Csp(2) and C=C bond lengths suggest that the contribution of the canonical structure can be described as N(+)=C-C=B(-).
منابع مشابه
9-Phenyl-3,6-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H-carbazole
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متن کاملN,N-Dimethyl-4-[(E)-2-(3,6,7-tribromo-9-butyl-9H-carbazol-2-yl)ethenyl]aniline
In the title mol-ecule, C(26)H(25)Br(3)N(2), a dihedral angle of 6.15 (10)° is present between the carbazole and benzene ring systems with an E conformation about the C=C bond [1.335 (4) Å]. The butyl group is almost perpendicular to the carbazole plane [C-N-C-C torsion angle = -98.7 (3)°]. In the crystal, supra-molecular double chains along [-7,18,-16] are formed via C-H⋯Br and π-π inter-actio...
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عنوان ژورنال:
دوره 68 شماره
صفحات -
تاریخ انتشار 2012