Research Article: Bis(6-meth­oxy-1-methyl-2,3,4,9-tetra­hydro-1H-β-carbolin-2-ium) tetra­chloridozincate(II) dihydrate

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): Teik Beng Goh, Mohd Nizam Mordi, Sharif Mahsufi Mansor, Mohd Mustaqim Rosli, Hoong-Kun Fun.


The asymmetric unit of the title compound, (C13H17N2O)2[ZnCl4]·2H2O, contains two tetra­hydro­harmine cations, one tetra­chloro­zincate(II) anion and two water mol­ecules. In the cations, the two 1H-indole ring systems are essentially planar, with maximum deviations of 0.016 (2) and 0.018 (2) Å, and both tetra­hydro­pyridinium rings show a half-chair conformation. The ZnII complex anion has a distorted tetra­hedral geometry. In the crystal, inter­molecular N—H⋯O, N—H⋯Cl, O—H⋯O, O—H⋯Cl and C—H⋯O hydrogen bonds link the components into a three-dimensional network. A π–π inter­action with a centroid–centroid distance of 3.542 (14) Å is also observed.

Partial Text

For the biological activity of metal complexes with 6-meth­oxy-1-methyl-4,9-dihydro-3H-pyrido[3,4-b]indole, see: Al-Allaf et al. (1990 ▶); Herraiz et al. (2003 ▶). For structures of β-carboline and related compounds, see: Anlong et al. (2007 ▶); Larghi et al. (2005 ▶); Reimers et al. (1984 ▶); Wouters (1997 ▶); Ferretti et al. (2004 ▶). For a related tetra­chloridozincate structure, see: Ma et al. (2009 ▶). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986 ▶).