Volume 69 Received 23 November 2012 | ||||||||||
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aDepartment of Chemistry, J. J. Strossmayer University, Osijek, Franje Kuhaca 20, HR-31000 Osijek, Croatia
Correspondence e-mail: tombalic@kemija.unios.hr
The title compound, C18H18O4, is a triclinic polymorph of the previously reported monoclinic polymorph [Han & Zhen (2005
). Acta Cryst. E61, o4358-o4359]. In the crystal of the triclinic polymorph, molecules are linked by two pairs of C-H
O hydrogen bonds, forming a two-dimensional network parallel to (102), and enclosing loops with graph set motifs of R22(8) and R22(6).
For the monoclinic polymorph, see: Han & Zhen (2005
). For related structures and the synthesis of similar compounds, see: Balic et al. (2012
); Ma & Cao (2011
); Dehno Khalaji et al. (2011
); Narasimha Moorthy et al. (2005
); Ilhan et al. (2007
). For graph-set analysis of hydrogen bonds, see Bernstein et al. (1995
).
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Data collection: CrysAlis PRO (Oxford Diffraction, 2009
); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SIR2004 (Burla et al., 2005
); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008
); molecular graphics: ORTEP-3 (Farrugia, 2012
); software used to prepare material for publication: WinGX (Farrugia, 2012
), PARST97 (Nardelli, 1995
) and Mercury (Macrae et al., 2006
).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: NG5308 ).
This work was supported by the Ministry of Science, Education and Sports of the Republic of Croatia (grant No. 119-1193079-1084). The authors wish to thank Professor Dubravka Matkovic-Calogovic for help with the crystallography.
Balic, T., Markovic, B. & Balic, I. (2012). Acta Cryst. E68, o2664.
![[details]](../../../../../../e/graphics/details.gif)
Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem. Int. Ed. Engl. 34, 1555-1573.
![[ISI]](../../../../../../logos/isiborder.gif)
Burla, M. C., Caliandro, R., Camalli, M., Carrozzini, B., Cascarano, G. L., De Caro, L., Giacovazzo, C., Polidori, G. & Spagna, R. (2005). J. Appl. Cryst. 38, 381-388.
![[details]](../../../../../../j/graphics/details.gif)
Dehno Khalaji, A., Hafez Ghoran, S., Gotoh, K. & Ishida, H. (2011). Acta Cryst. E67, o2484.
![[details]](../../../../../../e/graphics/details.gif)
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.
![[details]](../../../../../../j/graphics/details.gif)
Han, J.-R. & Zhen, X.-L. (2005). Acta Cryst. E61, o4358-o4359.
![[details]](../../../../../../e/graphics/details.gif)
Ilhan, S., Temel, H., Yilmaz, I. & Kilic, A. (2007). Transition Met. Chem. 32, 344-349.
![[ChemPort]](../../../../../../logos/chemportborder.gif)
Ma, Z. & Cao, Y. (2011). Acta Cryst. E67, o1503.
![[details]](../../../../../../e/graphics/details.gif)
Macrae, C. F., Edgington, P. R., McCabe, P., Pidcock, E., Shields, G. P., Taylor, R., Towler, M. & van de Streek, J. (2006). J. Appl. Cryst. 39, 453-457.
![[details]](../../../../../../j/graphics/details.gif)
Narasimha Moorthy, J., Natarajan, R. & Venugopalan, P. (2005). J. Mol. Struct. 741, 107-114.
![[CrossRef]](../../../../../../logos/crossrefborder.gif)
Nardelli, M. (1995). J. Appl. Cryst. 28, 659.
![[details]](../../../../../../j/graphics/details.gif)
Oxford Diffraction (2009). CrysAlis PRO. Oxford Diffraction Ltd, Yarnton, England.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
![[details]](../../../../../../a/graphics/details.gif)