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氯化二乙烯合铑二聚体

氯化二乙烯合铑二聚体
识别
CAS号 12081-16-2
PubChem 45357812
ChemSpider 21241609
SMILES
 
  • C=C.C=C.C=C.C=C.[Cl-].[Cl-].[Rh].[Rh]
InChI
 
  • 1S/4C2H4.2ClH.2Rh/c4*1-2;;;;/h4*1-2H2;2*1H;;/p-2
InChIKey QPOCZCJMFQWGSP-UHFFFAOYSA-L
性质
化学式 C8H16Cl2Rh2
摩尔质量 388.93 g·mol⁻¹
外观 红色固体
危险性
GHS危险性符号
《全球化学品统一分类和标签制度》(简称“GHS”)中有害物质的标签图案
GHS提示词 警告
H-术语 H315, H319
P-术语 P264, P280, P302+352, P305+351+338, P321, P332+313, P337+313, P362
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

氯化二乙烯合铑二聚体是一种有机铑化合物英语Organorhodium chemistry,化学式为Rh2Cl2(C2H4)4,分子中存在两个桥联氯和四个乙烯配体。它是红橙色固体,可溶于非极性有机溶剂。它可用于制备一系列的均相催化剂。[1][2]

制备与反应

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它可由水合三氯化铑的甲醇水溶液和乙烯在室温时的还原反应制得:

2 RhCl3(H2O)3 + 6 C2H4 → Rh2Cl2(C2H4)4 + 2 CH3CHO + 4 HCl + 4 H2O

它的乙烯配体不稳定,无法重结晶,甚至可以被其它烯烃取代。[3]

它可以缓慢和水反应,生成乙醛。和HCl反应,得到RhCl2(C2H2)2。Rh2Cl2(C2H4)4可以催化乙烯二聚为1-丁烯。它的羰基化反应生成氯化二羰基铑英语rhodium carbonyl chloride。它和乙酰丙酮氢氧化钾在水溶液中反应,生成Rh(acac)(C2H4)2

参考文献

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  1. ^ Hayashi, Tamio; Takahashi, Makoto; Takaya, Yoshiaki; Ogasawara, Masamichi "Catalytic Cycle of Rhodium-Catalyzed Asymmetric 1,4-Addition of Organoboronic Acids. Arylrhodium, Oxa-π-allylrhodium, and Hydroxorhodium Intermediates" Journal of the American Chemical Society 2002, vol. 124, pp. 5052-5058.doi:10.1021/ja012711i
  2. ^ Neely, Jamie M. chlorobis(ethylene)rhodium(I) dimer. E-EROS Encyclopedia of Reagents for Organic Synthesis. 2014: 1–6. ISBN 9780470842898. doi:10.1002/047084289X.rn01715. 
  3. ^ Richard Cramer "Di-μ-chlorotetrakis(ethylene)dirhodium(I), 2,4-pentanedionatobis(ethylene)rhodium(I), and di-μ-chlorotetracarbonyldirhodium(I)" Inorganic Syntheses 1974, vol. 15, pp. 14-18.. doi:10.1002/9780470132463.ch4
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氯化二乙烯合铑二聚体
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