Received 1 December 2008
The title compound, C20H18N4, is a flexible 3,3'-bipyridyl-type ligand with a long spacer group between the two pyridyl functions. The molecule crystallizes around an inversion center, with one half-molecule in the asymmetric unit and a dihedral angle of 71.85 (8)° between the pyridine ring and the central benzene ring.
For background information on bipyridyl-type Schiff base ligands, see: Cho et al. (2006); Haga et al. (1985); Mahmoudi et al. (2007); Wang et al. (2008). Haga et al. (1985) describe the synthesis of the title compound.
Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); 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.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: ZL2166 ).
The authors thank the Center for Testing and Analysis at Yangzhou University for support.
Bruker (2000). SADABS and SAINT . Bruker AXS Inc., Madison, Wisconsin, USA.
Cho, B. Y., Min, D. W. & Lee, S. W. (2006). Cryst. Growth Des. 6, 342-347.
Haga, M. & Koizumi, K. (1985). Inorg. Chim. Acta, 104, 47-50.
Mahmoudi, G., Morsali, A., Hunter, A. D. & Zeller, M. (2007). CrystEngComm, 9, 704-714.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Wang, Q., Yang, R., Zhuang, C. F., Zhang, J. Y., Kang, B. S. & Su, C. Y. (2008). Eur. J. Inorg. Chem. 10, 1702-1711.