Syntheses and structure characterization of four inorganic–organic hybrid solids based on N-containing aromatic Brønsted bases and chlorometallates

Abstract

Four organic–inorganic hybrid complexes ([(HL1)₂SnCl₆] · 2H₂O (1) (L1 = 2-methylquinoline), [(HL2)₂(CdCl₄)] · 2H₂O (2) (L2 = 5,7-dimethyl-1,8-naphthyridine-2-amine), [(H₂L2)₂SnCl₆] · 2(Cl) (3), and [(H₂L3)SnCl₆] · 2H₂O (4) (L3 = 3,6-bis(imidazol-1-yl)pyridazine)) derived from N-containing aromatic Brønsted bases and metal(II) chloride dihydrate (tin(II) chloride dihydrate and cadmium(II) chloride dihydrate) were prepared and characterized by IR, X-ray structure analysis, elemental analysis, and TG analysis. The aromatic rings of the cations in all of the compounds are essentially planar. X-ray diffraction analysis revealed that 2–4 have 3-D network structures built from hydrogen bonds between the cations and chlorometallates. Water molecules also play important roles in structure extension in 1, 2, and 4. The arrangements of the anions and cations in their solid state are dominated by shape, size, and symmetry of the cations and the different structures of the chlorometallates as well as by hydrogen-bond interactions.

Keywords:

• Tin
• Cadmium
• Crystal structure
• N-Containing aromatic Brønsted bases
• Inorganic–organic hybrid

Acknowledgments

We gratefully acknowledge the Education Office Foundation of Zhejiang Province (project No. Y201017321) and the Zhejiang A & F University Science Foundation (project No. 2009FK63) for the financial support.