Synthesis of rhodium carbonyl compounds at atmospheric pressure. III. Synthesis of Rh4(CO)12 and of Rh6(CO)16
Synthesis of rhodium carbonyl compounds at atmospheric pressure. III. Synthesis of Rh4(CO)12 and of Rh6(CO)16
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常压下羰基铑化合物的合成。
DOI：
10.1016/s0020-1693(00)92502-7
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发表时间：
1969
影响因子：
2.8
通讯作者：
S. Martinengo
中科院分区：
文献类型：
--
作者：
P. Chini;S. Martinengo
在常压和室温下，在水存在下，用一氧化碳还原Rh 2（CO）4Cl 2，得到中等产率（60%）的Rh 4（CO）12。在有机溶剂中，在少量水存在下，获得Rh 6（CO）16（30%）。在碱性条件下进行了同样的反应：Rh_4（CO）_1_2由含碳酸氢钠的正己烷（82%）制得，Rh_6（CO）_1_6由乙酸锂（77%）在水-醇体系中制得。最后两种合成方法由于Rh_2（CO）_4Cl_2易得、产率高、操作简单，具有特殊的实际意义。讨论了这两种簇合物的物理化学性质。
Rh4(CO)12was obtained in moderate yield (60 %) by reducing Rh2(CO)4Cl2at atmospheric pressure and room temperature with carbon monoxide in the presence of water. In organic solvents and in the presence of minor quantities of water Rh6(CO)16was obtained (30%). The same reaction have been carried out under alkaline conditions: Rh4(CO)12was obtained using hexane containing suspended sodium hydrogen carbonate (82%), and Rh6(CO)16in water-alcohol in the presence of lithium acetate (77%). These last, two syntheses seem to be of particular practical significance, owing to easy availability of Rh2(CO)4Cl2, high yield and extreme simplicity. The physical and chemical properties of the two cluster carbonyls are discussed.