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Scorpionate nickel complexes with dicarboxylic acid ligands: influence of different spanning dicarboxylato co-ligands on the structures |
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| Authors: | Zhao Yan Deng Feng Ying Bai Dong Ming Wei Zhen Li Yong Heng Xing Yun Zhu Cao Dong Xue Ren |
| Institution: | 1. College of Chemistry and Chemical Engineering, Liaoning Normal University, Huanghe Road 850#, Dalian, 116029, People??s Republic of China 2. College of Life Sciences, Liaoning Normal University, Dalian, 116029, Liaoning, China 3. ARC Centre of Excellence for Functional Nanomaterials, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia |
| Abstract: | Three new scorpionate nickel complexes Tp*Ni(Hglu)(H2O)]·EtOH (1), Tp*Ni(Haze)(MeOH) (2), and Tp*Ni(HTA)(H2O) (3) (Tp*?=?hydrotris(3,5-dimethylpyrazolyl)borate) with different spanning dicarboxylo co-ligands (H2glu?=?glutaric acid, H2aze?=?azelaic acid, H2TA?=?tetradecane diacid) were synthesized by solution methods at room temperature. X-ray crystallographic analyses of complexes 1?C3 demonstrate that these three octahedral Ni scorpionate complexes each contain an anionic chelating dicarboxylic acid, O2C(CH2) n COOH, n?=?3, 7, and 12, respectively. The sixth coordination site is occupied by an ethanol, methanol, or water that is hydrogen bonded to the terminal carboxylic acid end of the anionic dicarboxylic acid ligand from a different Tp*Ni complex in the crystal lattice. Through these abundant hydrogen bond interactions, complexes 1 and 2 form 2D hydrogen bonding network structures, respectively, while complex 3 has a 1D infinite double-chain structure. The results of quantum mechanical calculations and thermogravimetric analyses on these complexes are presented and discussed. |
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