Citation: DING Ke, SUN Zun-Ming, LI Hou-Qian, TANG Liang-Fu. Reaction of Tungsten Carbonyl with Bis(pyrazol-1-yl)methanes Functionalized by Azaaryl Groups[J]. Chinese Journal of Inorganic Chemistry, ;2015, (2): 345-352. doi: 10.11862/CJIC.2015.058 shu

Reaction of Tungsten Carbonyl with Bis(pyrazol-1-yl)methanes Functionalized by Azaaryl Groups

1.
Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China

Corresponding author: TANG Liang-Fu,
Received Date: 4 November 2014
Available Online: 28 November 2014
Fund Project: 国家自然科学基金(No.21372124) (No.21372124)NFFTBS(No.J1103306)资助项目 (No.J1103306)

Reaction of W(CO)₆ with (N-methylimidazol-2-yl)bis(3,5-dimethylpyrazol-1-yl)methane (L¹), (pyridin-2-yl)bis(3,5-dimethylpyrazol-1-yl)methane (L²) and (pyridin-4-yl)bis(3,5-dimethylpyrazol-1-yl)methane (L³) yielded complexes LW(CO)₅ (L=L¹ or L³), LW(CO)₄ (L=L¹, L² or L³) and LW(CO)₃ (L=L¹ or L²), respectively. NMR, IRand X-ray structural analyses indicated that these three ligands possessed variable coordination modes in these complexes. L¹ and L³ acted as monodentate ligands through the imidazolyl nitrogen or the pyridyl nitrogen in LW(CO)_5. A N,N'-chelating bidentate ligand through the imidazolyl nitrogen and one pyrazolyl nitrogen was observed in L¹W(CO)₄, while L² and L³ acted as N,N-chelating bidentate ligands through two pyrazolyl nitrogens in L²W(CO)₄ and L³W(CO)_4. A tridentate N,N,N'-chelating ligand through two pyrazolyl nitrogens and the imidazolyl or 2-pyridyl nitrogen was observed in L¹W(CO)₃ and L²W(CO)_3. The different donor ability of these imidazolyl, pyridyl and pyrazolyl nitrogens possibly plays important roles for the structural diversity. CCDC: 1030402, 2; 1030403, 4; 1030404, 7.
- N ligand;bis(pyrazol-1-yl)methane;imidazole;pyridine;tungsten
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沈阳化工大学材料科学与工程学院沈阳 110142