Hydrogen bonding in two tetracyclic indole alkaloids

Varma, A. K. ; Nangia, A. ; Desiraju, G. R. ; Giri, V. S. ; Jaisankar, P. (2001) Hydrogen bonding in two tetracyclic indole alkaloids Acta Crystallographica Section C: Crystal Structure Communications, 57 . pp. 97-99. ISSN 0108-2701

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Official URL: http://scripts.iucr.org/cgi-bin/paper?fr1299

Related URL: http://dx.doi.org/10.1107/S0108270100014220


3-Acetyl-1,6,7,12b-tetrahydroindolo[2,3-a]quinolizin-2(12H)-one, C17H16N2O2, consists of two symmetry-independent molecules and each forms a layered structure stabilized by N-H…O and C-H…O hydrogen bonds. In 3-acetyl-6,7-dihydroindolo[2,3-α ]quinolizin-4(12H)-one monohydrate, C17H14N2O2·H2O, the structure is stabilized by O-H…O, N-H···O and C-H…O hydrogen bonds, with the ordered water molecule playing a crucial role in the self-assembly. Contribution from the weak interactions to the strong hydrogen-bonded network is a common feature in both structures.

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