| Abstract
| - The novel digallanes (3) (Dipp = 2,6-diisopropylphenyl) and (4) (Dep = 2,6-diethylphenyl)were obtained in quantitative yield by photolysis of the1-galla-2,5-diazoles (1) and (2), respectively. This alternative approach to the synthesis ofdigallanes demonstrates the efficiency of the Cp* moietyas the leaving group in the formation of metal−metalbonds. Compounds 3 and 4 were characterized byspectroscopic and analytical data. Compound 3 couldfurther be characterized by X-ray crystallography; itsmolecular structure is compared with the structures ofsome other digallanes. Density functional calculationsfor differently substituted digallanes are presented.
- Irradiation of the 1-galla-2,5-diazoles (1) (Dipp = 2,6-diisopropylphenyl) and (2) (Dep = 2,6-diethylphenyl) leads to the formation of the digallanes (3) and (4), respectively, in quantitative yield. This novel synthetic route is based on the easy homolytic splitting of Cp*−Ga bonds. The molecular structure of 3 is compared with the structures of some other digallanes. Density functional calculations for differently substituted digallanes are presented.
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