Received 29 February 2012
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-HO, N-HCl, O-HO, O-HCl and C-HO hydrogen bonds link the components into a three-dimensional network. A - interaction with a centroid-centroid distance of 3.542 (14) Å is also observed.
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 -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).
Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IS5085 ).
This work was supported by USM Research University Grant No. 1001/CDADAH/815020 and the R&D Initiative Fund, Ministry of Science, Technology and Innovation, Malaysia (MOSTI). HKF also thanks Universiti Sains Malaysia for the Research University Grant No. 1001/PFIZIK/811160.
Al-Allaf, T. A. K., Ayoub, M. T. & Rashan, L. J. (1990). J. Inorg. Biochem. 38, 47-56.
Anlong, X., Zihou, W., Wenlie, P. & Rhui, C. (2007). Curr. Med. Chem. 14, 479-500.
Bruker (2009). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
Cosier, J. & Glazer, A. M. (1986). J. Appl. Cryst. 19, 105-107.
Ferretti, V., Gilli, P. & Borea, P. A. (2004). Acta Cryst. B60, 481-489.
Herraiz, T., Galisteo, J. & Chamorro, C. (2003). J. Agric. Food Chem. 51, 2168-2173.
Larghi, E. L., Amongero, M., Bracca, A. B. J. & Kaufman, T. S. (2005). Arkivoc, xii, 98-153.
Ma, P.-H., Fan, Z.-F., Zhang, Y.-Q., Xiao, X. & Xue, S.-F. (2009). Acta Cryst. E65, m655.
Reimers, W., Guth, H. & Wang, Z.-T. (1984). Acta Cryst. C40, 977-978.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Spek, A. L. (2009). Acta Cryst. D65, 148-155.
Wouters, J. (1997). Bull. Soc. Chim. Belg. 106, 759-766.