Tuning the topologies of MnII complexes with 3-(2-pyridyl)pyrazole and carboxylate ligands by intramolecular hydrogen bonds and the geometries of pendant ligands:: crystal structures and magnetic properties

被引:42
|
作者
Zou, RQ
Liu, CS
Shi, XS
Bu, XH [1 ]
Ribas, J
机构
[1] Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China
[2] Nanjing Univ, State Key Lab Coordinat Chem, Nanjing 210093, Peoples R China
[3] Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain
来源
CRYSTENGCOMM | 2005年 / 7卷
关键词
D O I
10.1039/b513269j
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In our efforts to investigate the influence of intramolecular hydrogen bonding interactions and the geometries of pendant ligands on the structures of low-dimensional coordination architectures, two kinds of ligands have been selected: a) a chelating ligand, 3-(2-pyridyl) pyrazole (L-1), with a non-coordinated nitrogen atom as a good hydrogen bonding acceptor and b) three pendant monocarboxylato ligands with different aromatic backbones (L-2, L-3 and L-4), and their Mn-II complexes, [Mn(L-1)(2)(L-2)(2)] (1), [Mn(L-1)(2)(L-3)(2)] (2) and [Mn-2(L-1)(2)(L-4)(4)] (3), have been prepared and structurally characterized by single crystal X-ray diffraction analysis. The results show clearly that the chelating 3-(2-pyridyl) pyrazole ligand plays the dominant role in the adjustment of the modes of the monocarboxylate ligands through strong intramolecular hydrogen bonding interactions and results in the formation of low-dimensional coordination complexes. The geometry of the anthracene ring also plays a vital role in determining the topology of 3, which further affects the magnetic interactions between the metal centers.
引用
收藏
页码:722 / 727
页数:6
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