Unstable compounds with double-bonded silicon and germanium atoms silenes, silanones, germanones, germathiones

5 Unstable compounds with double-bonded silicon and germanium atoms (silenes, silanones, germanones, germathiones) 

Compounds containing double-bonded silicon and germanium atoms are the nearest analogues of olefins, ketones and thioketones. However, most of them are very unstable and highly reactive species. 

The first successful stabilization of a silene, Me2Si=CH2 [117], in an argon matrix was achieved in experiments on the vacuum pyrolysis of 1,1-dimethylsilacyclobutane [118] (Mal tsev et al., 1976b). The IR spectra of the silene [117] and some of its deuterated analogues have been recorded 

A first attempt in argon matrices to stabilize silenes H2Si=CH2 and Cl2Si=CH2, which do not have multiatomic substituents at the silicon atom. 

The IR spectrum of another silene homologue, trimethylsilaethene [121], Me2Si=CHMe, was recorded after matrix stabilization of the products of 

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