1-[(1-Benzyl-1H-1,2,3-triazol-4-yl)meth-yl]indoline-2,3-dione.

In the title compound, C18H14N4O2, the triazole ring makes dihedral angles of 77.32 (8) and 75.56 (9)°, respectively, with the indoline residue and the terminal phenyl group. In the crystal, mol-ecules are linked by C-H⋯N hydrogen bonds into tapes parallel to the b axis. The tapes are linked together by π-π inter-actions between triazole rings [inter--centroid distance = 3.4945 (9) Å].

1-Do-decyl-indoline-2,3-dione.

The structure of the title compound, C20H29NO2, is isotypic to that of its homologue 1-octylindoline-2,3-dione. The indoline ring and the two carbonyl-group O atoms are approximately coplanar, the largest deviation from the mean plane being 0.0760 (10) Å. The mean plane through the fused-ring system is nearly perpendicular to the mean plane passing through the 1-dodecyl chain [dihedral angle = 77.69 (5)°]. All C atoms of the dodecyl group are in an anti-periplanar arrangement. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming a three-dimensional network.

1-(Prop-2-yn-yl)indoline-2,3-dione.

The structure of the title compound, C11H7NO2, is isotypic to that of its homologue, 1-octylindoline-2,3-dione [Qachchachi et al. (2013 ▶). Acta Cryst. E69, o1801]. The indoline ring and the two carbonyl O atoms are approximately coplanar, the largest deviation from the mean plane being 0.021 (1) Šfor one of the O atoms. The mean plane through the fused ring system is nearly perpendicular to the propynyl group, as indicated by the N-C-C-C torsion angle of 77.9 (1)°. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds and π-π inter-actions between benzene rings [inter-centroid distance = 3.5630 (10) Å], forming a three-dimensional structure.

3-(2,3-Dioxoindolin-1-yl)propane-nitrile.

The asymmetric unit of the title compound, C11H8N2O2, contains two independent mol-ecules (A and B). Each mol-ecule is build up from fused five- and six-membered rings with the former linked to a cyano-ethyl group. The indoline ring and two carbonyl O atoms of each mol-ecule are nearly coplanar, with the largest deviations from the mean planes being 0.0198 (9) (mol-ecule A) and 0.0902 (9) Š(mol-ecule B), each by a carbonyl O atom. The fused ring system is nearly perpendicular to the mean plane passing through the cyano-ethyl chains, as indicated by the dihedral angles between them of 69.72 (9) (mol-ecule A) and 69.15 (9)° (mol-ecule B). In the crystal, mol-ecules are linked by C-H⋯O and π-π [inter-centroid distance between inversion-related indoline (A) rings = 3.6804 (7) Å] inter-actions into a double layer that stacks along the a-axis direction.

1-Octylindoline-2,3-dione.

In the title compound, C16H21NO2, the indoline ring and the two ketone O atoms are approximately coplanar, the largest deviation from the mean plane being 0.063 (2) Å. The mean plane through the fused ring system is nearly perpendicular to the mean plane passing through the 1-octyl chain [dihedral angle = 77.53 (17)°]. In the crystal, mol-ecules are linked by C-H⋯O hydrogen bonds, forming a three-dimensional network.