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Original Articles

MESITYL-FLUORO-, -METHOXY- et -METHYLTHIO-GERMANES

, , , &
Pages 189-199 | Received 04 Feb 1991, Accepted 11 Mar 1991, Published online: 23 Sep 2006
 

Abstract

L'hydrolyse acide (HF) des mésitylémthoxygermanes MesnGe(OMe)4–n conduit aux mésitylfluorogermanes MesnGeF4–n précurseurs synthétiques de germanes encombrés et d'espéces du germanium à basse coordinence. La lithiogermolyse de leur liaison germanium-hétéroélément conduit également aux di-germanes correspondants. Les mésitylméthylthiogermanes MesnGe(SMe)4–n ont été également synthétisés sous catalyse radicalaire par action des hydrogermanes MesnGeH4–n sur le diméthyldisulfure réactif spécifique de radicaux centrogermaniés ou de germylénes.

Un certain caractére d'instabilité appara[icaron]t dans la série monomésitylée, stériquement la moins protégée dans laquelle nous avons observé des réactions de redistribution-symétrisation, d'élimination cyclisante et de transfert monoélectronique en présence de nucléophiles (RMgX).

Acid hydrolysis (HF) of mesitylmethoxygermanes MesnGe(OMe)4–n leads to mésitylfluorogermanes MesnGeF4–n often a necessary step for the synthesis of sterically hindered germanium centers, precursors of germanium species in low coordination state. The lithiogermolysis of the germanium heteroelement bond in these compounds leads to digermanes formation. The mesitylmethylthiogermanes MesnGe(SMe)4–n were obtained in radical initiated synthesis from reactions between MesnGeH4–n and dimethyldisulfide, a specific trapping reagent for germanium centered radicals and germylenes have been also synthesized.

The monomesityl germanium series less sterically hindered shows some instability: redistribution-symetrisation reactions, cyclo-elimination and SET reactions in the presence of nucleophiles (RMgX) have been observed.

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