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四苄基铪

四苄基铪
英文名 Tetrabenzylhafnium
别名 四苄铪
识别
CAS号 31406-67-4  checkY
性质
化学式 C28H28Hf
摩尔质量 543.01 g·mol−1
外观 黄色针状晶体[1]
浅黄色晶体(0 °C)[2]
橙色晶体(−40 °C)[3]
熔点 112—114 °C(385—387 K)[2]
结构
晶体结构 正交晶系(−40 °C)
空间群 Pbca(−40 °C)[3]
相关物质
其他阴离子 四苯基铪
其他阳离子 四苄基钛
四苄基锆
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

四苄基铪是一种金属有机化合物,化学式为Hf(CH2C6H5)4,它可用作烯烃聚合催化剂的前体。[1]

制备

[编辑]

将高纯度的四氯化铪置于干燥的乙醚中搅拌,降温至−78 °C后滴加1.0 mol/L的苄基氯化镁的乙醚溶液,真空蒸去溶剂后用60 °C的庚烷(或己烷[2])溶解固体,降温得到四苄基铪晶体。[1]

参考文献

[编辑]
  1. ^ 1.0 1.1 1.2 Roberta Cipullo, Vincenzo Busico, Natascia Fraldi, Roberta Pellecchia, Giovanni Talarico. Improving the Behavior of Bis(phenoxyamine) Group 4 Metal Catalysts for Controlled Alkene Polymerization. Macromolecules. 2009-06-23, 42 (12): 3869–3872 [2020-01-18]. ISSN 0024-9297. doi:10.1021/ma9006957 (英语). . (Supporting Information, PDF format页面存档备份,存于互联网档案馆))
  2. ^ 2.0 2.1 2.2 J.J. Felten, W.P. Anderson. Nuclear magnetic resonance studies of Lewis base adducts of tetrabenzylhafnium and tetrabenzylzirconium. Journal of Organometallic Chemistry. 1972-03, 36 (1): 87–92 [2020-01-18]. doi:10.1016/S0022-328X(00)85125-6 (英语). 
  3. ^ 3.0 3.1 Gwyneth R. Davies, J. A. J. Jarvis, B. T. Kilbourn. The crystal and molecular structures (at –40 °C) of the tetrabenzyls of titanium, hafnium, and tin. J. Chem. Soc. D. 1971, 0 (23): 1511–1512 [2020-01-18]. ISSN 0577-6171. doi:10.1039/C29710001511 (英语). 
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四苄基铪
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