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五羰基锇

五羰基锇
识别
CAS号 16406-49-8  checkY
SMILES
 
  • O#C[Os](C#O)(C#O)(C#O)C#O
性质
化学式 C5O5Os
摩尔质量 330.28 g·mol−1
外观 无色液体
熔点 2.0—2.5 °C(275.1—275.6 K)
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

五羰基锇是一种有机锇化合物,化学式为Os(CO)5,是锇最简单的可分离出来的羰基配合物。它是无色挥发性液体,可由十二羰基三锇在280-290 °C、200 atm下和一氧化碳反应得到。与之相比,钌的相应反应只需160 °C、200 atm即可进行。[1]

反应

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五羰基锇加热至80 °C会转化为Os3(CO)12,相应的五羰基钌在室温即可完成转化。[1]它和氯气反应,可以得到[Os(CO)5Cl]+配阳离子:[1]

Os(CO)5 + Cl2 → [Os(CO)5Cl]+Cl

五羰基锇的己烷溶液在紫外光的照射下和乙烯反应,生成一、二或者三取代的衍生物:[2]

Os(CO)5 + n C2H4 → Os(CO)5-n(C2H4)n + n CO (n = 1,2,3)

参考文献

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  1. ^ 1.0 1.1 1.2 Rushman, Paul; Van Buuren, Gilbert N.; Shiralian, Mahmoud; Pomeroy, Roland K. Properties of the Pentacarbonyls of Ruthenium and Osmium. Organometallics. 1983, 2 (5): 693–694. doi:10.1021/om00077a026. 
  2. ^ Kiel, Gong Yu; Takats, Josef; Grevels, Friedrich Wielhelm. Multisubstitution of Os(CO)5 by ethylene: Isomeric Os(CO)2(C2H4)3 and a Derivative of Os(CO)(C2H4)4. Journal of the American Chemical Society. 1987, 109 (7): 2227–2229. doi:10.1021/ja00241a075. 
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五羰基锇
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