Synthesis, crystal structure and Hirshfeld surface analysis of 1-(12-bromo-dodec-yl)indoline-2,3-dione

Acta Crystallogr E Crystallogr Commun. 2023 Oct 19;79(Pt 11):1033-1036. doi: 10.1107/S2056989023009052. eCollection 2023 Nov 1.

Abstract

In the title compound, C20H28BrNO2, the indoline portion is almost planar and the 12-bromo-dodecyl chain adopts an all-trans conformation apart from the gauche terminal C-C-C-Br fragment. A micellar-like structure is generated in the crystal by C-H⋯O hydrogen bonds and π-stacking inter-actions between indolinedione head groups and inter-calation of the 12-bromo-dodecyl tails. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H⋯H (58.9%), H⋯O/O⋯H (17.9%) and H⋯Br/Br⋯H (9.5%) contacts. A density functional theory (DFT) optimized structure at the B3LYP/ 6-311 G(d,p) level shows good agreement with the experimentally determined mol-ecular structure in the solid state.

Keywords: crystal structure; dodec­yl; hydrogen bond; indoline-2,3-dione; inter­calation; π stacking.

Grants and funding

The support of NSF–MRI grant No. 1228232 for the purchase of the diffractometer and Tulane University for support of the Tulane Crystallography Laboratory are gratefully acknowledged. TH is grateful to Hacettepe University Scientific Research Project Unit (grant No. 013 D04 602 004).