biostudies-literatureUnknown67(Pt 9)Letessier JThe title compound, C(21)H(13)NO(2), was prepared as an example of a new synthesis of carbazoles from a cyclic dibenzo-iodo-lium salt via a twofold Pd-catalysed aryl-ation of a primary amine. The two essentially planar π-subsystems [maximum deviations from the mean square plane of 0.038 (2) Å in the carbazole and 0.059 (2) Å in the coumarine unit] open a dihedral angle of 63.05 (4)°. Two mol-ecules form a centrosymmetrical pair connected via π-π inter-actions between the pyrrole and pyrone rings [centroid-centroid distance = 3.882 (1) Å] and one benzene of the carbazole and the pyrone unit [centroid-centroid distance 3.824 (1) Å]. The lattice is stabilized by C-H⋯O bridging to both coumarin O atoms.Acta crystallographica. Section E, Structure reports onlineo2494https://www.ebi.ac.uk/biostudies/studies/S-EPMC3200909biostudies-literature3-(9H-Carbazol-9-yl)-2H-chromen-2-one.PMC3200909Detert HLetessier JSchollmeyer Dfalse3-(9H-Carbazol-9-yl)-2H-chromen-2-one.The title compound, C(21)H(13)NO(2), was prepared as an example of a new synthesis of carbazoles from a cyclic dibenzo-iodo-lium salt via a twofold Pd-catalysed aryl-ation of a primary amine. The two essentially planar π-subsystems [maximum deviations from the mean square plane of 0.038 (2) Å in the carbazole and 0.059 (2) Å in the coumarine unit] open a dihedral angle of 63.05 (4)°. Two mol-ecules form a centrosymmetrical pair connected via π-π inter-actions between the pyrrole and pyrone rings [centroid-centroid distance = 3.882 (1) Å] and one benzene of the carbazole and the pyrone unit [centroid-centroid distance 3.824 (1) Å]. The lattice is stabilized by C-H⋯O bridging to both coumarin O atoms.2011-01-01T00:00:00Z2011 Sep2025-04-04T08:05:44.529Z2019-03-26T23:59:28ZS-EPMC32009092205904410.1107/S1600536811034660