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題名 | Four-and Five-Coordinate Gallium Complexes Stabilized by Bidentate 2-(Dimethylaminomethyl) Pyrrole Ligand--Molecular Structures of Ga[NC[feb2]H[feb0](CH[feaf]NMe[feaf])-2][feb0]and GaMe[feaf][NC[feb2]H[feb0](CH[feaf]NMe[feaf])-2]= |
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作者 | 余如晴; 黃瑞賢; 李錦祥; 彭旭明; Yu, Ru-ching; Huang, Jui-hsien; Lee, Gene-hsiang; Peng, Shie-ming; |
期刊 | Journal of the Chinese Chemical Society |
出版日期 | 20021200 |
卷期 | 49:6 2002.12[民91.12] |
頁次 | 頁975-980 |
分類號 | 346.01 |
語文 | eng |
關鍵詞 | Gallium; Bidentate; Pyrrole; N ligand; |
英文摘要 | Treatment of GaCl�� with one equiv of Li[NC�淡��(CH�烤Me��)-2 ] (n=1,2,3) in diethyl ether at -78℃ yields GaCl[NC�淡��(CH�烤Me��)-2]�a (n=1,1;n=2,2;n=3,3). Compound 1 reacts with two equiv of RLi to afford GaR �� [NC�� H��(CH�� NMe��)-2] (4a, R=Me; 4b, R=Bu) via transmetalltion. Reacting 2 with one equiv of RLi in diethyl ether, 3 and 4 are formed via ligand redistribution. Variable temperature HNMR spectroscopic experiments reveal that the five-coordinate gallium compound 3 is fluxional and results in a coaleseence temperature at 5℃, at which Δ G is calculated at ca. 10.4 Kcal/mole. All the new compounds have been characterized by �禧 and �CC NMR spectroscopy and the structures of compounds 3 and 4a have also been determined by X-ray crystallography. |
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