Organoruthenium compounds

As for organoruthenium compounds, they have been published for their catalytic reactions. Recently, many studies of organosynthetic reactions have been reported. 

Organoruthenium compounds are prepared by the following five reaction methods. (1) Carbonylations... 

Organoruthenium compounds tend to form complexes coordinated by the 10 electrons of cyclic unsaturated compounds similar to ferrocene in organoiron compounds, for example, ruthenocene (r/ -C5H5)2Ru and tf( / -C6Hx)Ru. As shown in Scheme 16.1, ruthenium chloride 3H20 reacts with unsaturated cyclic compounds in the presence of zinc metal to afford cyclic compounds coordinated by 10 electrons by dehydrogenation [15-18]. In the case of cyclopentadiene, ruthenocene is formed by the coordination of two five-electron rings. In the case of 1,3-cyclohexadiene, the complex is obtained to be coordinated with 4-electron 1,3-cyclohexadiene and with 6-electron benzene. In the case of 1,3-cycloheptadiene... 

Ru3(CO)i2 is the most stable and so the handling is easy. Then Ru3(CO)i2 is used as the basic compound for the raw materials of organoruthenium compounds. For example, the hydride is prepared by the reaction of Ru3(CO)i2 with bubbling hydrogen into the octane solution and refluxing for one hour as shown in eq. (16.12)... 

As the other synthetic method of organoruthenium compounds, the reaction of organolithium compounds or Grignard reagents with metal halides, which is the representative synthetic method of the main group organometallic compounds, is also available [25—28]. For example, organoalkali metal compounds react easily with ruthenium halides to form condensation products as shown in eq. (16.17) [25]. 

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