Rhodium 226 Inorganic Syntheses

No alternative preparative method for either ethylene complex has been reported. A synthesis of dichlorotetracarbonyldirhodium from rhodium trichloride trihydrate and carbon monoxide was described in Inorganic Syntheses.3 However, it is convenient to convert [Rh2(C2H4)4Cl2] to [Rh2(CO)4Cl2], even though the over-all yield (60%) of the carbonyl produced in this way from rhodium trichloride trihydrate is less than through direct carbonyla-tion (96 %).3... 

The simplest case is that of a 5-ring chelate based on 1,2-Z w(diphenylphosphino)ethane. Inorganic stereochemists have long appreciated the chiral conformations adopted by 2,3-diaminobutane derivatives, but it was not until 1977 that Fryzuk and Bosnich applied this knowledge to phosphine chemistry. The synthesis of chiraphos and its cationic rhodium complex (7) was most fruitful, and optical yields of nearly... 

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