Nonorganometallic Approaches to a C—Ge Bond

Alkyliodogermanes were produced by direct synthesis only in 1963-1966 ° . It is noteworthy that no compounds having Ge—H bonds (such as RGeHCH or R2GeHCl) were formed during the direct synthesis of alkylchlorogermanes, in contrast with the direct synthesis of alkylchlorosilanes. 

In 1958 Ponomarenko and coworkers found that HGeCH was exothermally added to ethylene at 40 atm pressure in the presence of H2PtCl6 to give EtGeCl3 in 25% yield. In the same yeai Mironov and Dzhurinskaya in Petrov s laboratory unexpectedly discovered that the reaction of HGeCl3 and diverse unsaturated compounds proceeded exothermally at room temperature and without either catalyst or initiator . On the 

In 1962, Satge and Lesbre279.280 carried out for the first time hydrogemylation of the carbonyl group of aldehydes and ketones. 

The best method for the synthesis of aryltrihalogermanes based on the reaction of aryl iodides and GeX4 (X = Cl, Br) in the presence of copper powder was discovered by Mironov and Fedotov2 i 282 1954. Bauer and Burschkies discovered in 1932 an unusual way of Ge—C boud formation by condensation of GeCl4 and aromatic amines according to equation 3. The reaction products were isolated as the corresponding substituted pheuylgermsesquioxanes. 

In 1958, Nesmeyanov and coworkers2 ° found that decomposition of aryldiazonium tetrafluoroborates with zinc dust in the presence of GeCLj resulted in formation of aryl-trichlorogermanes in 30% yield, isolated as the corresponding arylgermsesquioxanes. 

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