Physical-chemical studies and reactivity of new divalent germanium species

Article abstract of DOI:10.1016/s0020-1693(96)05294-2

This work concerns the synthesis of five- and six-membered ring heterocyclic germylenes, derived from hydroxy or thiohydroxy acids and germanium spiranic corresponding structures. These compounds were prepared by the exchange reaction of dichlorogermylene or germanium tetrachloride with different germanium heterocycle compounds containing Ge(IV). Structural studies (IR, ¹³C NMR) of 11-17 revealed that these derivatives, which show a double or triple mass peak in mass spectroscopy, are intermoleculary associated by the carbonyl group to the metal C=O| → Ge. However, different cycloaddition reactions with dienes, quinones and heterobutadienes showed these dimers or trimers had a germylene type reactivity. Oxidation reactions of germylenes 10 and 12 are also described.