Abstract
Three copper(II), one zinc(II), and one ferrous(II) complexes having 3-bromo or 3,8-dibromo-1,10-phenanthroline ligand with different metal/ligand molar ratios, formulated as [Cu(3-bromo-phen)(ClO4)(C3H7NO)2(H2O)](ClO4) (1), [Cu(3,8-dibromo-phen)(ClO4)(C3H7NO)2(H2O)](ClO4) (2), [Cu(3,8-dibromo-phen)(ClO4)(H2O)3](ClO4)(H2O)3 (3), [Zn(3,8-dibromo-phen)2(H2O)2](ClO4)2(H2O)2 (4), and [Fe(3,8-dibromo-phen)3](ClO4)2(H2O)(CH4O)(C3H6O)2 (5) (phen = 1,10-phenanthroline), have been synthesized and characterized in this paper. X-ray single-crystal diffraction studies reveal the different crystallographic symmetry and packing fashions between neighboring phen rings in 1:1 Cu(II) complexes 1–3 due to the alteration of bromo substituent 1,10-phenanthroline ligands and coordinated or free solvent molecules. Additionally, in 1:2 Zn(II) and 1:3 Fe(II) complexes 4 and 5, continuous π–π stacking and alternating π–π and dimeric p–π stacking are found.
Graphical abstract
Five mononuclear complexes having 3-bromo or 3,8-dibromo-1,10-phenanthroline ligand with different molar ratios of metal and ligand have been spectrally and structurally characterized, where different one-dimensional π–π stacking modes are found in the crystal packing of 1, 3, 4, and 5.
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Acknowledgments
W.H. acknowledges the Major State Basic Research Development Programs (Nos. 2007CB925101, 2011CB933300, and 2011CB808704), the National Natural Science Foundation of China (No. 20871065) and the Jiangsu Province Department of Science and Technology (No. BK2009226).
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Xu, F., Hu, B., Tao, T. et al. Supramolecular frameworks composed of copper(II), zinc(II), and ferrous(II) complexes having 3-bromo or 3,8-dibromo-1,10-phenanthroline ligand with different molar ratios of metal and ligand. Struct Chem 22, 123–133 (2011). https://doi.org/10.1007/s11224-010-9702-y
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DOI: https://doi.org/10.1007/s11224-010-9702-y