Synthesis and structure of 9-methyl-1,10-dihydropyrazolo[3,4- a ]carbazole
Abstract
The title carbazole derivative, C 14 H 11 N 3 , was prepared by reacting 1-hydroxy-8-methyl-9 H -carbazole-2-carbaldehyde with hydrazine hydrate. In the solid state, the fused-ring system is slightly puckered, the dihedral angle between the planes of the outer rings being 2.24 (7)°. In the crystal, molecules are linked by {N—H} 2 ...N hydrogen bonds to generate [010] chains, and weak C—H...π contacts consolidate the structure. A Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H...H (43.1%), C...H/H...C (36.8%) and N...H/H...N (15.3%) interactions.
Fields of Study & Subjects
Crystallography and molecular interactions
Crystal structures of chemical compounds
Synthesis and Properties of Aromatic Compounds
Publication details
- Journal / source
- Acta Crystallographica Section E Crystallographic Communications
- Publisher
- International Union of Crystallography (IUCr)
- Volume
- 82
- Issue
- 2
- Pages
- 231–234
- Publication date
- 27 January 2026
- Language
- EN