Intermediaires organiques du germanium divalent: III obtention de germylenes γ-hydroxyles à partir de 3-chlorohydrogermyl-1-propanols et de 3-methoxyhydrogermyl-1-propanols

3-chlorohydrogermyl-1-propanols ClH₂Ge(CH₂)₃OH and Cl₂HGe (CH₂)₃OH are synthesized by action of mercury (II) chloride, in tetrahydrofuran, on 3-germyl-1-propanol H₃Ge(CH₂)₃OH. By thermal effect these halohydrides released hydrochloric acid, with formation of oxagermacyclopentanes (R = H or Cl); these derivatives decomposed by α-elimination with formation of γ-hydroxy divalent species of germanium RGe(CH₂CH₂)₃ OH (R = H or Cl). ‘Chlorine-methoxy’ exchange using tributylmethoxygermane on Cl₂HGe(CH₂)₃OH leads to the 3-methoxyhydrogermyl-1-propanols (MeO)ClHGe(CH₂)₃OH and (MeO)₂HGe(CH₂)₃OH; α-decomposition on the germanium atom in these latter compounds leads to the formation of the same γ-hydroxypropylgermylenes. These functional divalent germanium species were characterized by insertion into some σ-bonds.