No abstract

The title compound, C30H36N2O2, was prepared in a twofold Cadogan cyclization. The mol­ecule is located about a center of inversion. The indolocarbazole skeleton is essentially planar [maximum deviation = 0.028 (2) Å], the C—N bond lengths are nearly identical and the C—C bond lengths of the pyrrole unit are significantly longer than those of the benzene subunits.

Key indicators: single-crystal X-ray study; T = 193 K; mean (C-C) = 0.003 Å; R factor = 0.049; wR factor = 0.152; data-to-parameter ratio = 13.4.The title compound, C 22 H 20 N 2 O 2 , was prepared in a twofold Cadogan cyclization followed by double N-methylation. The crystal structure is characterized by a zigzag arrangement of centrosymmetric molecules. The indolocarbazole framework is essentially planar [maximum deviation = 0.028 (2) Å ] and the methoxy groups are orthogonal to this plane [C-C-O-C torsion angle = À88.2 (2) ]. The lengths of the C-N bonds are nearly identical and all C-C bonds of the pyrrole subunit are significantly longer than the C-C bonds in the benzene rings.

The title compound, 2C36H39N3O4·H2O, is a linear π-conjugated ladder oligomer with an alkyl chain on the central nitrogen atom. This diindolocarbazole, preparedviaa twofold Cadogan reaction, adopts a sligthly convex shape,antito the disordered octyl group. The unit cell contains nine molecules of the title compound and half a water molecule per main molecule. The water molecule forms hydrogen bridges, connecting the carbazole-NH and methoxy groups of different molecules. The crystal contains solvent molecules which are located in a channel parallel to thecaxis. It was not possible to determine the position and nature of the solvent (a mixure of choroform,n-pentane and DMSO). The SQUEEZE [Spek (2015).Acta Cryst.C71, 9–18] option ofPLATONwas used to model the missing electron density. The given chemical formula and other crystal data do not take into account these solvent molecules.

The title compound, C30H36N2O6, was prepared via twofold Suzuki coupling of a diboronic acid with bromo­nitro­benzene. The mol­ecule is located on a crystallographic inversion centre. The lateral benzene ring and the central ring make a dihedral angle of 48.75 (14)° and the nitro group is twisted by 41.47 (13)° out of the plane of the benzene ring. The nitro and hex­yloxy groups are in close proximity and the hex­yloxy chain adopts an all-anti conformation.