Syntheses, crystal structures, and properties of silver(I) complexes with oxazoline-containing bidentate ligand

Abstract

Three new silver(I) complexes, [Ag₂(L)₃](BF₄)₂ (1), [Ag₂(L)₃](PF₆)₂ (2), and [Ag₂(L)(CF₃COO)₂] (3), have been synthesized by reactions of 1,4-bis(2-oxazolinyl)benzene (L) with the corresponding silver(I) salt. The complexes were characterized by elemental analysis, IR, electrospray mass spectrometry, thermogravimetric analyses, powder X-ray diffraction, and single-crystal X-ray diffraction. The crystal structure analyses reveal that 1 and 2 crystallize in the same monoclinic space group P2₁/c and have the same 2-D layer structure, in which the counteranions and do not coordinate with silver(I). For 3, CF₃COO⁻ are auxiliary linkers to connect silver(I)'s to give 1-D chains which are further connected by L to form a 2-D layer structure. The results revealed that the nature of counteranions have impact on the structure of complexes.

Keywords:

• Silver(I) complex
• 1,4-Bis(2-oxazolinyl)benzene
• Metal–organic framework
• Electrospray mass spectrometry

Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Grant Nos 91122001 and 21021062) and the National Basic Research Program of China (Grant Nos 2007CB925103 and 2010CB923303).