Using a hydrocarbon-soluble Mg0 complex, the heavier tetrel elements silicon, germanium, tin and lead are reduced to their ultimate negative oxidation state −IV. Despite fulfilling the octet rule, tetra-anionic tetrels are highly reactive anions which react as strong Brønsted bases, quadruple nucleophiles or eight-electron reducing agents.
- J. Maurer
- J. Langer
- S. Harder