In the title compound, C(16)H(11)NS, the dihedral angles between the fused ring system and the pendant thienyl ring are 86.37 (5) and 57.14 (5)°.

In the title compound, C(16)H(16)BrN, the bromo-butyl group lies on one side of the carbazole ring plane and has a zigzag shape. The dihedral angle between the two benzene rings is 0.55°. In the crystal, mol-ecules are connected by van der Waals inter-actions.

Self-assembled monolayers (SAMs) based on Br-2PACz ([2-(3,6-dibromo-9H-carbazol-9-yl)ethyl]phosphonic acid) 2PACz ([2-(9H-Carbazol-9-yl)ethyl]phosphonic and MeO-2PACz ([2-(3,6-dimethoxy-9H-carbazol-9-yl)ethyl]phosphonic molecules were investigated as hole-extracting interlayers in organic photovoltaics (OPVs). The highest occupied molecular orbital (HOMO) energies of these SAMs measured at −6.0...

In the title compound, C(14)H(12)BrN, the fused-ring system is slightly buckled as its two benzene rings are inclined to one another by 3.41 (14)°.

The title compound, C(15)H(13)NO(2), was synthesized by N-alkyl-ation of methyl bromo-acetate with 9H-carbazole. The carbazole ring system is essentially planar (mean atomic deviation = 0.0346 Å) and makes a dihedral angle of 86.5 (7)° with the methyl acetate group. Weak inter-molecular C-H⋯O hydrogen bonding is present in the crystal structure.

The asymmetric unit of the title compound, C(17)H(20)N(2), contains two mol-ecules, whose bond lengths and angles differ only slightly. In the crystal, neighbouring mol-ecules form pillar structures via edge-to-face π-π stacking inter-actions [edge-to-face distances = 3.538 (3) and 3.496 (3)Å].