Citation:
LOTFALI Saghatforoush. Syntheses and Crystal Structures of Two New Hg(Ⅱ) and Cd(Ⅱ) Complexes with 2,3,5,6-Tetrakis-(2-pyridyl) Pyrazine[J]. Chinese Journal of Structural Chemistry,
2015, 34(12): 1869-1875.
doi:
10.14102/j.cnki.0254-5861.2011-0744
Syntheses and Crystal Structures of Two New Hg(Ⅱ) and Cd(Ⅱ) Complexes with 2,3,5,6-Tetrakis-(2-pyridyl) Pyrazine
摘要:
Under thermal gradient in solution phase, the reaction of Hg(Ⅱ) and Cd(Ⅱ) salts with 2,3,5,6-tetrakis-(2-pyridyl)pyrazine (tppz) in 1:1 molar ratio afforded dinuclear [{HgI2}2(μ-tppz)] (1) and mononuclear [CdI2(tppz)] (2) complexes. Single-crystal X-ray diffraction structural analysis reveals that the tppz acts as bis-tridentate and tridentate chelating ligands in 1 and 2, respectively. Metal(Ⅱ) ions adopt a distorted square pyramidal geometry and have the same coordination environment in both complexes. Based on the 1H NMR spectroscopy measurements, both complexes decompose in solution and release free tppz.
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关键词:
- Hg(Ⅱ) complex
- / Cd(Ⅱ) complex
- / tppz
- / crystal structure
- / 1H NMR
English
Syntheses and Crystal Structures of Two New Hg(Ⅱ) and Cd(Ⅱ) Complexes with 2,3,5,6-Tetrakis-(2-pyridyl) Pyrazine
Abstract:
Under thermal gradient in solution phase, the reaction of Hg(Ⅱ) and Cd(Ⅱ) salts with 2,3,5,6-tetrakis-(2-pyridyl)pyrazine (tppz) in 1:1 molar ratio afforded dinuclear [{HgI2}2(μ-tppz)] (1) and mononuclear [CdI2(tppz)] (2) complexes. Single-crystal X-ray diffraction structural analysis reveals that the tppz acts as bis-tridentate and tridentate chelating ligands in 1 and 2, respectively. Metal(Ⅱ) ions adopt a distorted square pyramidal geometry and have the same coordination environment in both complexes. Based on the 1H NMR spectroscopy measurements, both complexes decompose in solution and release free tppz.
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Key words:
- Hg(Ⅱ) complex
- / Cd(Ⅱ) complex
- / tppz
- / crystal structure
- / 1H NMR
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