Abstract
Three coordination complexes with N-donor ligands, Ag2(L1)1.5(NO3)2 (1), Ag3(L2)2(NO3)3 (2), and Ag(L1)2NO3 (3) {L1 = 1,4-bis(pyrazole-1-ylmethyl)benzene, L2 = 4,4′-bis(pyrazole-1-ylmethyl)biphenyl}, have been synthesized and structurally characterized by elemental analysis, IR spectroscopy, TGA, and X-ray single crystal diffraction. Complex 1 shows a 3-D fsh-3,4-P21/c structure with brevity code {83}2{85·10}. Complex 2 has a 3-D framework with a 2-D layer penetrated by an infinite 1-D zigzag chain. Complex 3 exhibits a (4,4)-net racemizing layer structure with nitrate anions filling the cavity. The results indicate that L1 and L2 can adopt varied conformations in formation of the complexes, and the length of the ligands plays a key role in configuring and directing the corresponding structure of the complexes.
Acknowledgments
We acknowledge the support of the Natural Science Foundation of Heilongjiang Province (B201108), Scientific Research Fund of Heilongjiang Provincial Education Department (12531512), and Heilongjiang University.